Abstract:
A manufacturing control and reporting method/system for manufacture of semiconductor devices comprises a system for loading a mechanical article handling device in a semiconductor manufacturing system, provides an automatic check-in and changing equipment status to an UP status, automatically checking whether the article handling system is empty, and for automatically changing the system status to an IDLE status. The system provides automatic check-in, and subsequent to processing of the workload by the plant provides track-out followed by automatically checking whether the article handling system is empty. Then the system checking whether a TE has arrived, and the system checks whether the TE has reloaded the article handling system.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to processes for control of the process of manufacturing semiconductor chips and more particularly to control of production in an integrated circuit manufacturing process. 
     2. Description of Related Art 
     See “Guideline for Definition and Measurement of Equipment Reliability, Availability and Maintainability, SEMI International Standards, SEMI E-10-92, pp 61-69 (1993); and Robert C. Leachman, “Closed-loop Measurement of Equipment Efficiency and Equipment Capacity”, IEEE/SEMI Advanced Semiconductor Manufacturing Conference, pp. 115-126 (1995). 
     U.S. Pat. No. 5,528,510 of Kraft for “Equipment Performance Apparatus and Method” describes a process control system and a method for yielding improvement in product throughput by using tuned model process control using product and machine parametric data, process control via real time critical equipment transient monitoring, process windowing of critical equipment of equipment transients and machine/product parametric data correlation. 
     U.S. Pat. No. 5,612,886 of Weng for “Method and System for Dynamic Dispatching in Semiconductor Manufacturing Plants” describes WIP management. 
     See U.S. Pat. No. 5,402,350 of Kline which shows a method for “Scheduling for Multi-Task Manufacturing Equipment” and U.S. Pat. No. 5,444,632 of Kline et al. for “Apparatus and Method for Controlling and Scheduling Processing Machines”. 
     SUMMARY OF THE INVENTION 
     This invention provides the features as follows: 
     1. Provide a useful metric (set of measurement parameters) for performance analysis. 
     2. OEE provides an excellent way for chip manufacturers and equipment suppliers to understand and track productivity and find ways to improve it. 
     3. When OEE is implemented in a manufacturing area, there are major savings in investments related to bottleneck machines. 
     In accordance with this invention, a manufacturing control and reporting method and system for manufacture of semiconductor devices comprises as follows: 
     a system for loading a mechanical article handling device in a semiconductor manufacturing system, 
     means for providing an automatic check-in and changing equipment status to an UP status, 
     means for automatically checking whether the article handling system is empty, and 
     means for automatically changing the system status to an IDLE status. 
     Preferably, the system provides automatic check-in, and 
     subsequent to processing of the workload by the plant provides track-out followed by automatically checking whether the article handling system is empty, 
     then the system checking whether a TE has arrived, and 
     the system checking whether the TE has reloaded the article handling system. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing and other aspects and advantages of this invention are explained and described below with reference to the accompanying drawings, in which: 
     FIG. 1 shows a flowchart of a computer program in accordance with this invention which is resident in factory control computer system which is a part of the overall computer system. 
     FIG. 2 shows the computer system employed to control a fabrication plant in accordance with the present invention. 
     FIG. 3 is a chart showing a control system for operating a system considered before reaching the system shown in FIG.  4 . 
     FIG. 4 is a chart showing a control system for operating a system in accordance with the system of this invention. 
     FIG. 5 shows a computer screen of an OEE Reporting System operated upon a personal computer based system employed in controlling the systems of FIGS. 1 and 2. 
     FIG. 6 shows another computer screen of the OEE Reporting System which provides an OEE Report help to trace productivity. 
     FIG. 7 shows another computer screen of the OEE Reporting System which provides a histogram of on the computer screen which facilitates realization of the difference between EQPS. 
     FIG. 8 shows another computer screen of the OEE Reporting System which provides a computer screen which has the data including “EFF &amp; WPH Subsystem” help to know average actual WPH, standard WPH &amp; EQP WPH. 
     FIG. 9 shows another computer screen of the OEE Reporting System which provides a computer screen which has the data as follows: “Best WPH Subsystem” help to find improvement opportunity of EQP &amp; recipe setting Function. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     
       
         
               
             
               
               
             
           
               
                   
               
               
                 Definitions 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 OEE: 
                 Overall Equipment Effectiveness 
               
               
                 EQP: 
                 Equipment 
               
               
                 UP: 
                 Equipment process (productive) 
               
               
                 BKUP: 
                 Equipment process (productive) time, but 
               
               
                   
                 production is allocated to another module or 
               
               
                   
                 fab causing a BacKUP in this module or fab. 
               
               
                 TE: 
                 Technical Employee: EQP Operator 
               
               
                 NO TE: 
                 EQP is in standby time due to unavailability 
               
               
                 UNLOAD/LOAD: 
                 of TE (operator) to load/unload wafers. 
               
               
                 (IDLE): 
               
               
                 WIP: 
                 Work In Process. 
               
               
                 NO WIP LOAD: 
                 EQP standby time due to no Wafers. 
               
               
                   
                 (WIP=) in production. 
               
               
                 LOST OTHERS: 
                 EQP standby time due to the fact that 
               
               
                   
                 downstream equipment is down or because of 
               
               
                   
                 waiting for a full batch of Wafers. 
               
               
                 WAIT PM: 
                 Time of EQP WAITing for equipment engineer to 
               
               
                   
                 perform, Preventive Maintenance 
               
               
                 WAIT ENG: 
                 Time EQP waiting for troubleshooting by 
               
               
                   
                 equipment/process ENGineer 
               
               
                 WAIT OCAP: 
                 Time of EQP waiting due to Out of Control for 
               
               
                   
                 Action Procedure (SPC) 
               
               
                 WAIT OTHERS: 
                 Time of EQP waiting for anything else. 
               
               
                 Casette: 
                 Container for Semiconductor Wafers to be used 
               
               
                   
                 in automatic material handling for 
               
               
                   
                 manufacturing process. 
               
               
                 POD: 
                 Container for Cassettes filled with 
               
               
                   
                 semiconductor wafers. 
               
               
                 TEST: 
                 Engineering time 
               
               
                 MFGHOLD: 
                 Force chamber to be down due to another 
               
               
                   
                 chamber down in Cluster tool 
               
               
                   
                 (Multi-chamber EQP) = EQ another chamber up 
               
               
                 Turn to: 
                 This has no meaning for OEE (just for 
               
               
                 another type: 
                 accounting purposes) 
               
               
                 PM: 
                 time of preventive maintenance 
               
               
                 MON: 
                 time of confirming EQP is workable 
               
               
                 DOWN: 
                 Hardware-related downtime. 
               
               
                 FAC: 
                 Facilities-related downtime. 
               
               
                 OFF: 
                 Shutdown (non-scheduled time). 
               
               
                 track in: 
                 Interface sends information to shop floor 
               
               
                   
                 control system when operator loads lot 
               
               
                   
                 into production. 
               
               
                 track out: 
                 Interface sends information to shop floor 
               
               
                   
                 control system when operator removes lot 
               
               
                   
                 from production. 
               
               
                 SAM: 
                 Interface (Smart Arm Master) 
               
               
                 Rework Qty: 
                 Quantity of work to be REWORKed. 
               
               
                 Scrap Qty: 
                 Scrap quantity. 
               
               
                 Track in Qty: 
                 Quantity of lots loaded into system. 
               
               
                 T_WPH: 
                 Theoretical throughput measured-Wafers/Hour. 
               
               
                 PROMIS: 
                 Data Processing System for Shopfloor control 
               
               
                   
                 system 
               
               
                 SMIF: 
                 Standard Mechanical InterFace article 
               
               
                   
                 handling device system and system as in 
               
               
                   
                 U.S. Pat. No. 5,669,508, commonly assigned, 
               
               
                   
                 of Chen-Chin Chen and Kuei-Lung Chou for 
               
               
                   
                 “Pod Carrier Function Expansion by Adding a 
               
               
                   
                 Fixture” and U.S. Pat. No. 5,611,452 of 
               
               
                   
                 Bonora et al. for “Sealable Transportable 
               
               
                   
                 Container Having Improved Liner” 
               
               
                 SMIF arm: 
                 Interface hardware for operator to 
               
               
                   
                 load/unload wafers into and from SMIF 
               
               
                 Eff. 
                 Efficiency 
               
               
                 AV. 
                 Availability 
               
               
                   
               
             
          
         
       
     
     In the current state of the art, the current situation is as follows: 
     1. OEE (Overall Equipment Effectiveness) is the percentage of time that the equipment is being used to produce wafers that are going to be shipped to a customer. 
     2. Weakness of current situation: 
     2.1 UP time can&#39;t stand for actual effectiveness of EQP: 
     2.1.1 After TRACK OUT, EQP status is still “UP” 
     2.1.2 Losses due to EQP idle are not included. 
     2.1.3 Losses due to scrap and rework are not included. 
     2.2 Can&#39;t trace productivity: 
     Definition of EQP status (e.g. UP, WAIT, LOST) is not sufficient. 
     3. There is a trend to adoption of OEE in semiconductor manufacturing. 
     1. OEE Formula in accordance with this invention. 
     
       
         
               
               
             
           
               
                   
               
             
             
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (1) 
               
               
                   
               
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (2) 
               
               
                   
               
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (3) 
               
               
                   
               
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (4) 
               
               
                   
               
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (5) 
               
               
                   
               
               
                 
                   
                             
                     
                         
                         
                     
                   
                 
                 (6) 
               
               
                   
               
               
                 1.5 Demand Efficiency = 1 
                 (7) 
               
               
                   
               
             
          
         
       
     
     1.6 IDLE : auto-count EQP waiting for TE 
     1.7 Rework &amp; Scrap Qty: 
     the invalid production is possibly caused by: 1.7.1 Upstream processing due to no quality inspection 
     point between previous workstation and current workstation. 
     1.7.2 Downstream processing and ever processed by current workstation. 
     1.7.3 Current workstation 
     2. Data Categories 
     
       
         
               
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 Availability (AVLBLTY) 
                   
               
               
                   
                 Performance Efficiency 
               
               
                   
                  Rate Efficiency 
               
               
                   
                  Operating Efficiency 
               
               
                   
                 Rate of Quality 
               
               
                   
                 Demand Efficiency 
               
               
                   
                 PRODUCTIVE 
                 UP 
               
               
                   
                 TIME 
                 BKUP 
               
               
                   
                 STANDBY 
                 LOST 
               
               
                   
                   
                 
                   NOTE UNLOAD 
                 
               
               
                   
                   
                 LOAD 
               
               
                   
                   
                 NO WIP LOAD 
               
               
                   
                   
                 LOST OTHERS 
               
               
                   
                   
                 WAIT 
               
               
                   
                   
                 WAIT PM 
               
               
                   
                   
                 WAIT ENG 
               
               
                   
                   
                 WAIT OCAP 
               
               
                   
                   
                 WAIT OTHERS 
               
               
                   
                 ENGINEERING 
                 TEST 
               
               
                   
                 SCHEDULED 
                 MFG HOLD 
               
               
                   
                 DOWNTIME 
                 EO Another Chamber UP 
               
               
                   
                   
                 Turn to Another type 
               
               
                   
                   
                 PM 
               
               
                   
                   
                 MON 
               
               
                   
                 UNSCHEDULED 
                 DOWN 
               
               
                   
                 DOWNTIME 
                 FAC 
               
               
                   
                 NON-SCHEDULE 
                 OFF 
               
               
                   
                   
               
             
          
         
       
     
     3. Up/BKUP Comparison 
     
       
         
               
               
               
             
           
               
                   
               
             
             
               
                   
                 up 
                   
               
               
                   
                 before OEE 
               
               
                 pod arrives 
                 --&gt;load cassette--&gt;procees--&gt;unload cassette 
                 --&gt;pod remove--&gt;pod arrive -- 
               
               
                   
                 after OEE 
               
               
                   
                 up 
                 idle(NO_TE) 
               
               
                   
               
             
          
         
       
     
     4. EQP Status Transition Flowchart 
     Referring to FIG. 1, a flowchart is shown of a computer program in accordance with this invention which is resident in factory control computer system  70  which is a part of the overall computer system  50  starts in block  10  and leads to block  12 , where the TE (Technical Employee: EQP Operator) puts the pod on the SMIF arm (of the article handling device.) 
     Block  12  is an “AUTO change” phase of operation of the system as indicated by block  40 , which begins the UP/BKUP phase of the operation of the system wherein computer automated materials handling and processing commences under control of the factory control computer system  70  in FIG.  2 . 
     Next, in step  14 , “automatic check-in” of the work loaded into the automated manufacturing plant occurs under control of factory control computer system  70 . 
     Then the factory operates to perform the functions include in block  16  comprising the steps as follows: 
     Load 
     Process Start 
     Process 
     Process Complete 
     Unload 
     Next, the system proceeds to block  18  which is the “track-out” function in which the interface sends information to shop floor control system  87  in FIG. 2, when the operator removes a lot from production. 
     Block  18  is another “AUTO change” phase of operation of the system as indicated by block  42 , which ends the UP/BKUP phase of the operation of the system wherein computer automated materials handling and processing commences under control of the computer system  70  in FIG.  2 . 
     Block  42  also designates the beginning of the IDLE: NO TE phase  44  of operation of the system. 
     In block  20  Auto check whether the SMIF arm is empty. 
     In block  22  removes the pod from the SMIF arm. 
     In decision block  24 , the system  70  determines whether the TE has arrived based upon an input provided by the TE to the system  50 . 
     Then the system calls for the TE to remove the pod from the SMIF arm, so the SMIF arm is empty. This marks the end of the IDLE: NO TE phase  44  of operation of the system. 
     In block  24 , the factory control system  70  checks to determine whether the TE has arrived? 
     If YES, then the system goes on to test blocks 26 and  28 . If NO, then as indicated by line  38  the result is that the system goes to block  28  as described below. 
     In block  26 , the factory control system  70  checks the shop floor  87  to determine whether the TE put the next pod on the SMIF arm? 
     If NO, the block  26  loops back to block  24  to determine whether the TE has arrived? If YES, the program loops back to block  12  and commences the process for another pod. This represents another “AUTO change” as indicated by block  48 . 
     Block  46  indicates a “TE change” phase of operation of the system at the input of block  28 . 
     In block  28 , the factory control system  70  determines whether a TE check for WIP has indicated whether there was any WIP found? 
     If YES, there is WIP, the block  30  a report of the “LOSS: Others Next Down or Full Batch” function is performed by the system  70 . As stated above, LOST OTHERS is defined as a condition in which EQuipment (EQP) is waiting during a standby time period due to the fact that downstream equipment is down or because of waiting for a full batch of Wafers. Then the system goes on to block  34 . 
     If NO WIP in block  28 , the factory control system  70  the LOSS: NO WIP Load function is performed by the system  70  and the program goes on to block  34 . 
     In block  34 , the system generates a call for a check as to whether the TE has put the next pod on the SMIF arm? After block  34 , line test  26 , the system loops back to block  12 . 
     FIG. 2 shows the computer system  50  employed to control a fabrication plant in accordance with the present invention. System  50  includes a central computer system  60  which comprises a CPU  61 , a terminal  67  with monitor  62  and keyboard  63  connected to the CPU  61  or receiving/sending data respectively from/to the CPU  61 . A random access memory  65  and a DASD  64  associated with the CPU  61  are shown connected for bidirectional communication with CPU  61 . 
     Line  76  connects from CPU  61  to line  176  which connects through the interface of factory control computer  70  through line  276  to CPU  71  of computer  70  which is in a fabrication plant  90 . 
     The factory control computer system  70  comprises a CPU  71 , a terminal  77  with monitor  72  and keyboard  73  connected to the CPU  71  for receiving/sending data respectively from/to the CPU  71 . A random access memory  75  and a DASD  74  associated with the CPU  71  are shown connected for bidirectional communication with CPU  71 . 
     Line  86  connects from CPU  71  to line  186  which connects through the interface of factory control computer  70  out to the shop floor  87  elements of the system. 
     FIG. 3 is a chart showing a control system for operating a system considered before reaching the system shown in FIG.  4 . 
     In FIG. 3, the operator performs the four steps as follows: 
     
       
         
               
               
             
               
               
               
               
             
           
               
                   
               
               
                 Operator 
                 Event 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 1. 
                 Operator put pod 
                 1. 
                 Lot auto-tracking 
               
               
                   
                 on SMIF arm 
                   
                 Auto recipe setting 
               
               
                 2. 
                 Change PROMIS EQP 
               
               
                   
                 status to UP by 
               
               
                   
                 manual operation. 
               
               
                   
                   
                 2. 
                 Start to auto-load cassette 
               
               
                   
                   
                 3. 
                 Auto-load cassette complete 
               
               
                   
                   
                   
                 Processing begins 
               
               
                   
                   
                 4. 
                 Processing ends 
               
               
                   
                   
                   
                 Start to auto-unload cassette. 
               
               
                   
                   
                   
                 Auto trackout 
               
               
                   
                   
                 5. 
                 Auto-unload cassette complete 
               
               
                 3. 
                 Operator removes pod. 
               
               
                 4. 
                 Change another EQP 
               
               
                   
                 status (if operator 
               
               
                   
                 remembers to change). 
               
               
                   
               
             
          
         
       
     
     The PROMIS, SAM, and EQPS information is tracked alongside the above entries in FIG.  3 . 
     FIG. 4 is a chart showing a control system for operating a system in accordance with the system of this invention, as follows: 
     
       
         
               
               
             
               
               
               
               
             
           
               
                   
               
               
                 Operator 
                 Event 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 1. 
                 Operator puts pod 
                 1. 
                 Lot auto-trackin Auto 
               
               
                   
                 on SMIF arm 
                   
                 recipe setting 
               
               
                   
                   
                 2. 
                 Start to auto-load cassette 
               
               
                   
                   
                   
                 Auto-change PROMIS equipment 
               
               
                   
                   
                   
                 status to UP by SAM 
               
               
                   
                   
                 3. 
                 Auto-load cassette complete Bid 
               
               
                   
                   
                   
                 Load Processing begin 
               
               
                   
                   
                 4. 
                 Processing end 
               
               
                   
                   
                   
                 Start to auto-unload cassette 
               
               
                   
                   
                   
                 Auto trackout 
               
               
                   
                   
                 5. 
                 Auto-unload cassette complete 
               
               
                   
                   
                   
                 Auto-change PROMIS equipment 
               
               
                   
                   
                   
                 status to IDLE by SAM 
               
               
                 2. 
                 Operator remove pod 
                   
                 Change another equipment status 
               
               
                   
               
             
          
         
       
     
     The PROMIS, SAM, and EQPS information is tracked alongside the above entries in FIG.  4 . 
     It can be seen that in the chart shown in FIG. 4, there are only two operator functions, which is two less operator  5  functions. In addition, there is an Auto-change of PROMIS equipment status to the UP status in event  2  and to the IDLE status in event  5  with the SAM (Smart Arm Master) interface. 
     In addition, it can be seen by the bold arrow line from SAM to PROMIS that the system changes the equipment status to UP after event  2 ; and that PROMIS sends back a concurrence message that the request from SAM has been granted (approved.) 
     After event  5 , the SAM system sends a change equipment to the IDLE status. 
     FIG. 5 shows a computer screen of an OEE Reporting System operated upon a personal computer based system employed in controlling the systems of FIGS. 1 and 2. 
     FIG. 6 shows another computer screen of the OEE Reporting System which provides an “OEE Report help to trace productivity. The screen has the data as follows: 
     
       
         
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                 OEE 
               
               
                 Function Time: 11-Jun-1997 7:20:00 - 27-Jun-1997 7:20:00 
               
             
          
           
               
                   
                 MET1 
                 MET10 
                 MET11 
                 MET12 
                 MET2 
                 MET3 
                 MET4 
                 MET5 
                 MET6 
                 MET7 
                 MET8 
                 MET9 
                 AVG 
               
               
                   
                   
               
             
          
           
               
                 Overall Equipment 
                 71.98 
                 93.53 
                 77.26 
                 59.10 
                 69.86 
                 74.81 
                 58.78 
                 72.25 
                 73.40 
                 70.61 
                 69.73 
                 81.41 
                 72.73 
               
               
                 Effectiveness (OEE) 
               
               
                 Availability 
                 82.28 
                 86.52 
                 88.39 
                 76.62 
                 85.23 
                 83.69 
                 65.38 
                 78.90 
                 75.38 
                 80.00 
                 77.80 
                 80.97 
                 80.10 
               
               
                 Performance Efficiency 
                 88.14 
                 108.40 
                 88.55 
                 77.22 
                 82.68 
                 90.02 
                 90.37 
                 92.57 
                 97.93 
                 89.00 
                 89.86 
                 101.37 
                 91.34 
               
               
                 Rate Efficiency 
                 105.03 
                 112.97 
                 96.49 
                 85.89 
                 91.30 
                 96.73 
                 109.15 
                 96.64 
                 102.77 
                 95.23 
                 97.35 
                 105.70 
                 99.60 
               
               
                 Operation Efficiency 
                 83.92 
                 95.95 
                 91.76 
                 89.91 
                 90.56 
                 93.06 
                 82.80 
                 95.79 
                 95.30 
                 93.46 
                 92.31 
                 95.91 
                 91.73 
               
               
                 Rate of Quality 
                 99.26 
                 99.73 
                 98.72 
                 99.89 
                 99.14 
                 99.30 
                 99.49 
                 98.92 
                 99.43 
                 99.17 
                 99.73 
                 99.18 
                 99.33 
               
               
                 Demand Efficiency 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
                 100.00 
               
             
          
           
               
                 PRODUCT- 
                 UP 
                 69.05 
                 83.02 
                 81.11 
                 68.89 
                 77.19 
                 77.88 
                 54.13 
                 75.58 
                 71.83 
                 74.77 
                 71.82 
                 77.65 
                 73.58 
               
               
                 IVE 
               
               
                 TIME 
                 BKUP 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
               
               
                 ENGINEER- 
                 TEST 
                 4.67 
                 0.00 
                 0.66 
                 0.18 
                 0.04 
                 0.00 
                 7.52 
                 0.00 
                 0.55 
                 0.00 
                 0.06 
                 0.00 
                 1.14 
               
               
                 ING 
               
               
                 STANDBY 
                 LOS 
               
               
                   
                 WAIT 
               
               
                   
                 NO TE 
                 2.70 
                 3.23 
                 5.21 
                 5.07 
                 4.19 
                 3.27 
                 2.71 
                 1.90 
                 2.46 
                 4.49 
                 4.93 
                 2.36 
                 3.54 
               
               
                   
                 NO WIP 
                 0.80 
                 0.00 
                 0.00 
                 0.30 
                 0.00 
                 0.00 
                 0.00 
                 0.04 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.10 
               
               
                   
                 LOAD 
               
               
                   
                 LOST 
                 5.06 
                 0.27 
                 1.42 
                 2.19 
                 3.82 
                 2.53 
                 1.01 
                 1.37 
                 0.54 
                 0.74 
                 0.99 
                 0.95 
                 1.74 
               
               
                   
                 OTHERS 
               
               
                   
                 WAIT PM 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.04 
                 0.06 
                 0.01 
               
               
                   
                 WAIT 
                 2.03 
                 0.85 
                 1.00 
                 2.49 
                 0.48 
                 1.29 
                 1.26 
                 2.19 
                 1.92 
                 4.43 
                 2.05 
                 1.92 
                 1.83 
               
               
                   
                 ENG 
               
               
                   
                 WAIT 
                 0.26 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.28 
                 0.39 
                 0.04 
                 0.00 
                 0.14 
                 0.16 
                 0.11 
               
               
                   
                 OCAP 
               
               
                   
                 WAIT 
                 5.26 
                 4.23 
                 2.42 
                 3.35 
                 3.86 
                 4.39 
                 1.64 
                 3.18 
                 2.67 
                 6.42 
                 2.18 
                 3.72 
                 3.61 
               
               
                   
                 OTHERS 
               
               
                 SCHED- 
                 MH 
               
               
                 ULED 
                 EQ 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
               
               
                 DOWN- 
                 OTHER 
               
               
                 TIME 
                 CHAM 
               
               
                   
                 TURN 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
               
               
                   
                 OTHER 
               
               
                   
                 TYP 
               
               
                   
                 PM 
                 3.48 
                 3.33 
                 2.07 
                 3.01 
                 3.52 
                 3.90 
                 9.34 
                 6.29 
                 9.03 
                 4.40 
                 5.90 
                 5.45 
                 4.98 
               
               
                   
                 MON 
                 4.72 
                 5.26 
                 5.88 
                 5.43 
                 6.14 
                 5.00 
                 7.94 
                 6.53 
                 4.91 
                 4.94 
                 6.96 
                 5.90 
                 5.80 
               
               
                 UNSCHED- 
                 DOWN 
                 0.88 
                 0.28 
                 1.33 
                 5.38 
                 0.00 
                 1.82 
                 14.32 
                 2.09 
                 3.11 
                 0.42 
                 4.83 
                 0.87 
                 2.94 
               
               
                 ULED 
                 FAC 
                 1.33 
                 0.45 
                 0.55 
                 4.49 
                 0.81 
                 0.80 
                 0.00 
                 0.25 
                 2.78 
                 0.99 
                 2.70 
                 0.96 
                 1.34 
               
               
                 DOWN- 
               
               
                 TIME 
               
               
                 NON- 
                 OFF 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
                 0.00 
               
               
                 SCHEDULE 
               
               
                   
               
               
                 F1 EQP Micr... Graphics Serve Microsoft PM 01-33 OEE  
               
             
          
         
       
     
     FIG. 7 shows another computer screen of the OEE Reporting System which provides a histogram of on the computer screen which facilitates realization of the difference between EQPS. 
     FIG. 8 shows another computer screen of the OEE Reporting System which provides a computer screen which has the data as follows: 
     
       
         
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                 “EFF &amp; WPH Subsystem” 
               
               
                 help to know average actual WPH, standard WPH &amp; EQP WPH *WPH: Wafers per hour 
               
               
                 Efficiency 
               
               
                 Function Time:- 27-Jun-1997 7:20:00 - 13-Jul-1997 7:20:00 Day/ShiftA 
               
             
          
           
               
                   
                 MET1 
                 MET10 
                 MET11 
                 MET12 
                 MET2 
                 MET3 
                 MET4 
                 MET5 
                 MET6 
                 MET7 
                 MET8 
                 MET9 
                 AVG/SUM 
               
               
                   
                   
               
             
          
           
               
                 MOVE 
                 1101 
                 1342 
                 920 
                 886 
                 1176 
                 1159 
                 1067 
                 1130 
                 903 
                 1031 
                 973 
                 878 
                 12566 
               
               
                 EQ_WPH 
                 17.69 
                 16.15 
                 13.54 
                 14.60 
                 15.32 
                 14.56 
                 15.31 
                 13.51 
                 15.75 
                 15.47 
                 15.20 
                 15.97 
                 15.26  
               
               
                 ACT_WPH 
                 16.62 
                 15.43 
                 12.87 
                 13.88 
                 14.93 
                 14.07 
                 14.97 
                 12.98 
                 15.38 
                 15.09 
                 14.77 
                 15.10 
                 14.67  
               
               
                 STD_WPH 
                 14.07 
                 12.16 
                 11.79 
                 13.69 
                 14.19 
                 13.85 
                 13.62 
                 12.20 
                 11.09 
                 14.17 
                 12.37 
                 12.89 
                 13.01  
               
               
                 T_WPH 
                 16.55 
                 14.31 
                 13.87 
                 16.10 
                 16.69 
                 16.29 
                 16.02 
                 14.36 
                 13.04 
                 16.67 
                 14.55 
                 15.16 
                 15.30  
               
               
                 ACT_EFF 
                 1.00 
                 1.08 
                 0.93 
                 0.86 
                 0.69 
                 0.86 
                 0.93 
                 0.90 
                 1.18 
                 0.90 
                 1.02 
                 1.00 
                 0.96 
               
               
                 STD_EFF 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.85 
                 0.65 
                 0.85 
                 0.85 
               
               
                 NOR_EFF 
                 1.18 
                 1.27 
                 1.09 
                 1.01 
                 1.05 
                 1.02 
                 1.10 
                 1.06 
                 1.39 
                 1.06 
                 1.19 
                 1.17 
                 1.13 
               
               
                   
               
               
                 En F1_EQP - M1... Microsoft Pc,... Graphics Server Microsof Wo.. Efficiency PM 0153  
               
             
          
         
       
     
     FIG. 9 shows another computer screen of the OEE Reporting System which provides a computer screen which has the data as follows: “Best WPH Subsystem” help to find improvement opportunity of EQP &amp; recipe setting 
     
       
         
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                 Function 
               
               
                 Time: 25 JUL-1997 07:20:00 - 07-AUG-1997 07:20:00 
               
             
          
           
               
                   
                 MET-1 
                   
                 MET-10 
                   
                 MET-11 
                   
                 MET-12 
                   
                 MET-2 
                   
                 MET-3 
                   
                 MET-4 
                   
               
               
                 RECPID 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
                 WPH 
                 GAP 
               
               
                   
               
             
          
           
               
                 1161 
                 19.299 
                 0 
                 18.239 
                 1.060 
                   
                   
                 17.447 
                 1.852 
                 16.612 
                 2.687 
                 17.572 
                 1.727 
                 17.577 
                 1.722 
               
               
                 1262 
                 19.113 
                 0 
                 18.155 
                 0.958 
                 17.987 
                 1.126 
                 17.442 
                 1.671 
                 116.603 
                 2.51 
                 17.55 
                 1.563 
                 17.608 
                 1.505 
               
               
                 2146 
                 14.857 
                 0 
               
               
                 2154 
                   
                   
                 15.149 
                 0.582 
                 15.137 
                 0.594 
                   
                   
                 13.996 
                 1.735 
                 15.731 
                 0.000 
                 14.817 
                 0.914 
               
               
                 2246 
               
               
                 2255 
               
               
                 2256 
                   
                   
                 15.060 
                 2.180 
                 14.948 
                 2.292 
                 14.519 
                 2.721 
                 14.576 
                 2.664 
                 14.576 
                 2.664 
                 14.579 
                 2.661 
               
               
                 2260 
               
               
                 2266 
                 14.904 
                 0 
               
               
                 3152 
                   
                   
                 15.163 
                 4.220 
                 15.101 
                 4.282 
               
               
                 3153 
               
               
                 3154 
               
               
                 3252 
                   
                   
                 15.109 
                 0.121 
                 15.054 
                 0.176 
               
               
                 3253 
               
               
                 3254 
               
               
                 3353 
               
               
                 3354 
                   
                   
                 18.026 
                 0.000 
               
               
                 3356 
                   
                   
                 15.023 
                 0.000 
                 14.881 
                 0.142 
               
               
                 3366 
                   
                   
                 18.072 
                 0.001 
                 17.899 
                 0.174 
               
               
                   
               
             
          
         
       
     
     Two monthly reports follow with the second showing the advantages of the system of FIGS. 1,  2 , and  4 - 9  in accordance with this invention. 
     
       
         
               
             
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                 M/C Efficiency Monthly Report 
               
               
                 M/C Efficiency Monthly Report: 
               
               
                 from 30-APR-1997 19:20:00 to 31-MAY-1997 19:20:00 
               
               
                 Report G 
               
             
          
           
               
                 LOCATION 
                 EQPTYPE 
                 EQPID 
                 MOVE 
                 ACT WPH 
                 STD WPH 
                 T WPH 
                 ACT EFF 
                 STD EFF 
                 NOR EFF 
               
               
                   
               
               
                   
                 BDRY-MET 
                 BMET-1-A 
                 8428 
                 16.1 
                 14.4 
                 16.9 
                 0.9536 
                 0.8500 
                 1.1219 
               
               
                   
                   
                 BMET-10A 
                 8070 
                 13.9 
                 11.9 
                 14.1 
                 0.9858 
                 0.8500 
                 1.1598 
               
               
                   
                   
                 BMET-11A 
                 7940 
                 14.2 
                 12.3 
                 14.5 
                 0.9794 
                 0.8500 
                 1.1522 
               
               
                   
                   
                 BMET-2-A 
                 8235 
                 14.1 
                 14.4 
                 16.9 
                 0.8322 
                 0.8500 
                 0.9791 
               
               
                   
                   
                 BMET-3-A 
                 9304 
                 14.8 
                 14.1 
                 16.6 
                 0.8961 
                 0.8500 
                 1.0530 
               
               
                   
                   
                 BMET-4-A 
                 78S9 
                 15.2 
                 13.0 
                 15.2 
                 0.9995 
                 0.8500 
                 1.1759 
               
               
                   
                   
                 BMET-4-D 
                 24 
                 11.0 
                 14.4 
                 17.0 
                 0.0024 
                 0.8500 
                 0.0028 
               
               
                   
                   
                 BMET-5-A 
                 8495 
                 14.0 
                 13.6 
                 16.1 
                 0.8691 
                 0.8500 
                 1.0225 
               
               
                   
                   
                 BMET-6-A 
                 8812 
                 14.0 
                 13.3 
                 15.6 
                 0.8961 
                 0.8500 
                 1.0542 
               
               
                   
                   
                 BMET-7-A 
                 8657 
                 14.3 
                 13.4 
                 15.8 
                 0.9039 
                 0.8500 
                 1.0634 
               
               
                   
                   
                 BMET-8-A 
                 7492 
                 14.9 
                 13.2 
                 15.6 
                 0.9610 
                 0.8500 
                 1.1306 
               
               
                   
                   
                 BMET-9-A 
                 8386 
                 14.5 
                 12.4 
                 14.6 
                 0.9983 
                 0.8500 
                 1.1745 
               
             
          
           
               
                 ***AUG. 
                 91703 
                 13.3 
                 13.2 
                 15.6 
                 0.8526 
                 0.8500 
                 1.0031 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
               
                 M/C Availability Monthly Report 
               
               
                 FAB2B M/C Availability Monthly Report: 
               
               
                 from 30-APR-1997 19:20:00 to 31-MAY-1997 19:20:00 
               
             
          
           
               
                   
                   
                   
                   
                 TEST/ 
                   
                   
                 MOM/ 
                   
                   
                   
                   
                   
                   
                   
               
               
                 EQPID 
                 ACT_WPH 
                 UP 
                 BKUP 
                 ENG 
                 LOST 
                 MFGHOLD 
                 TPH 
                 PM 
                 WAIT 
                 DOWN 
                 FAC 
                 MTBF 
                 MTTR 
                 AUL 
               
               
                   
               
             
          
           
               
                 BMET-1-A 
                 16.1 
                 75.4 
                 0.0 
                 1.1 
                 3.7 
                 0.4 
                 5.8 
                 3.6 
                 4.4 
                 4.3 
                 1.3 
                  94.9 
                 5.4 
                 80.3 
               
               
                 BMET-1-B 
                 0.0 
                 65.3 
                 0.0 
                 11.3 
                 3.7 
                 0.4 
                 5.1 
                 3.6 
                 4.6 
                 4.8 
                 1.3 
                  81.4 
                 5.1 
                 80.2 
               
               
                 * AUG 
                 8.1 
                 70.3 
                 0.0 
                 6.2 
                 3.7 
                 0.4 
                 5.5 
                 3.6 
                 4.5 
                 4.6 
                 1.3 
                  88.1 
                 5.2 
                 80.2 
               
               
                 BMET-2-A 
                 14.1 
                 78.0 
                 0.0 
                 1.1 
                 2.5 
                 0.4 
                 8.3 
                 2.9 
                 3.4 
                 2.8 
                 1.6 
                 193.6 
                 7.0 
                 80.6 
               
               
                 BMET-2-B 
                 0.0 
                 79.2 
                 0.0 
                 1.1 
                 2.5 
                 0.4 
                 7.4 
                 2.9 
                 3.5 
                 1.5 
                 1.6 
                 199.2 
                 3.6 
                 82.8 
               
               
                 * AUG 
                 7.1 
                 78.6 
                 0.0 
                 0.6 
                 2.5 
                 0.4 
                 7.8 
                 2.9 
                 3.4 
                 2.1 
                 1.6 
                 198.4 
                 5.3 
                 81.7 
               
               
                 BMET-3-A 
                 14.8 
                 84.6 
                 0.0 
                 0.0 
                 3.6 
                 0.2 
                 5.7 
                 4.1 
                 1.4 
                 0.1 
                 0.3 
                 629.1 
                 0.8 
                 88.2 
               
               
                 BMET-3-B 
                 0.0 
                 84.3 
                 0.0 
                 0.2 
                 3.5 
                 0.2 
                 5.7 
                 4.1 
                 1.6 
                 0.1 
                 0.3 
                 628.6 
                 0.8 
                 88.0 
               
               
                   
               
             
          
         
       
     
     While this invention has been described in terms of the above specific embodiment(s), those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims, i.e. that changes can be made in form and detail, without departing from the spirit and scope of the invention. Accordingly all such changes come within the purview of the present invention and the invention encompasses the subject matter of the claims which follow.