Patent ID: 6633791
Filing Date: 2003-10-14
Classification: G06Q

Abstract:
A method for determining an Index of Dynamic Forward Loading (IDFL) for a stage on a production line comprising:calculate a Work In Processi (WIPi) for a stage STkk for each lot Li in a queue of lots being processed in a production line between said stage STkk and end point, where â€œiâ€  is a positive integer representing the position of said lot Li in said queue, and where â€œkkâ€  is a positive integer indicating the sequential position of the stage STkk in a location along said production line from the beginning to the end of a predetermined portion of said production line, calculate remaining scheduled cycle time (RCTi) for each lot Li, calculate consumed scheduled cycle time (CSTi) for each lot Li, calculate WIPi*RCTi for each lot Li, calculate WIPi*CSTi for each lot Li, summing WIPi*RCTi for all lots Li of a stage, summing WIPi*CSTi for all lots Li of a stage, calculate an Index of Dynamic Forward Loading (IDFL) Intensity for each stage STkk by dividing the Sum WIPi*RCTi, for all lots of the stage STkk, by the Sum WIPi*CSTi, for all lots of the stage STkk, where kk is a positive integer indicating the location of the stage from the beginning to the end of said production line, and adjust dispatching order of lots based on IDFL Intensity of all stages of the production line, with lowest IDFL Intensity having priority.