(1) The use of the CPM makes it easier to plan, schedule, and manage the sequence of work activities to complete a project on time. (2) The CPM requires a formal, detailed listing of all work related activities that make up the whole project. This requires you to visualize the project from start to finish, so you can estimate the amount of time and the resources required to complete each project activity. (ON SLIDE #9) (3) The CPM is also known by a few other general phrases. Regardless of which phrase is used, they represent the Critical Path Method. (a) Construction Management. (b) Project Planning and Scheduling. (c) Critical Path Analysis. (ON SLIDE #10) `b. Using the CPM for Planning: In military construction, the use of the CPM begins with planning. Planning is divided into two distinct stages: (ON SLIDE #11) (1) Preliminary Planning: Gives the engineer a quick overall picture of the assigned project and the capacity of the constructing unit to accomplish it. It serves as a guide to the detailed planning which follows. Preliminary planning includes: (a) Project site reconnaissance. (b) Preliminary material estimates. (c) Preliminary equipment estimations. (d) Procurement of critical items. (ON SLIDE #12) (2) Detailed Planning: Develops an accurate estimate of the work activities, materials, man-hours, and equipment required
“immediately” proceed the one that is listed. In other words, what activity(s) must be completed before another one can begin? Starting activities will always have the word “None” listed here. (ON SLIDE #21) f. of Activities: Ask yourself the following questions for each work activity of the project to develop the finished activities list: (1) Which activities start at the beginning of the project? (Starting Activities) (2) Which activities must be finished before another activity can begin? (Preceding Activities) (3) Which activities can either start or finish at the same time as another activity? (Concurring Activities) (4) activities cannot begin until another activity is finished? (Succeeding Activities) (5) Which activities may start when a portion of another activity is complete? (Lagging Activities) (ON #22) Finished Activities List Activity Number Activity IPB 5 “Topo” project site None 10 Create project drawings 5 15 Order gravel None 20 Prefabricate forms None 25 roadway 10 30 Set road alignments 25 35 Establish road grades 30 40 road grades 35 45 Lay gravel 15,40 50 pad site 10 55 Layout pad batterboards 50 60 Excavate pad footings 55 65 Check pad elevation’s 60 70 concrete forms 20,65
45 (1) Compactor 50 (1) Survey Crew Problem Activity Activity Number Number Resources 3 5 (1) Grader 10 (2) Dozer’s USE WORKSHEET 9 15 (2) Squads 20 (3) 7 Tons 25 (1) Compactor 30 (1) Compactor 35 (1) Survey Crew 40 (1) Survey Crew 45 (2) 7 Tons 50 (1) Survey Crew WORKSHEET 6 (CONT) Problem Activity Activity Number Number Resources 4 5 (1) Survey Crew 10 (2) Dozer’s USE WORKSHEET 10 15 (1) Squad 20 (2) Squads 25 (1) Grader 30 (1) 420D 35 (2) Compactor 40 (3) Squads 45 (2) 7 Tons Problem Activity Activity Number Number Resources 5 5 (1) Survey Crew 10 (2) Draftsman USE WORKSHEET 11 15 (2) Squads 20 (2) Graders 25 (1) 420D 30 (1) Compactor 35 (1) Grader 40 (1) Survey Crew Problem Activity Activity Number Number Resources 6 5 (2) Squads 10 (1) Survey Crew USE WORKSHEET 12 15 (1) Draftsman 20 (1) 7 Ton 25 (1) Grader 30 (1) 420D 35 (1) Tram 40 (3) Squads 45 (1) Compactor