Method for performing dynamic re-scheduling of fabrication plant

A method for performing dynamic re-scheduling of priorities of work-in-process in a fabrication plant for manufacturing of a product comprising:

• reading a key stage report for said work-in-process and a master production schedule for said work-in-process from stored data,
• generating a master production schedule report from said key stage report and said master production schedule following only Due_Date data for said work-in-process,
• generating a work-in-process distribution matrix for integrating said master production schedule report with work-in-process quantity data within a deliverable cycle time,
• allocating selected lots from said work-in-process distribution matrix using a snake pattern method to allocate said selected lots from said matrix,
• changing the due date for said selected lots of said work-in-process selected by said snake pattern method, and
• generating a final re-scheduling table for said work-in-process including said selected lots, where ∑ X = 1 , Y = 1 X = n , Y = 3 ⁢ MPSR ⁡ ( Due — ⁢ Date ⁢ ⁢ ( X ) , CT ⁡ ( Y ) ) = Designed ⁢ ⁢ Out
• CT=Cycle Time
• X=1, 2, 3 . . . m
• Y=1, 2, 3 . . . p
• where m and p are positive integers and MPSR=Master Production Schedule Report,
• using said Due_Date data in allocating said selected lots,
• using a link with products in allocating said selected lots,
• using theoretical process time to make an exact re-scheduling automatically to ensure linear wafer output performance in allocating said selected lots, and
• fitting work-in-process in said key stage report to meet requirements of said master production schedule when forming said master production schedule.

A system for performing dynamic re-scheduling of priorities of work-in-process (WIP) in a fabrication plant for manufacturing of a product comprising:

• key stage report means for performing the step of reading a key stage report for said work-in-process and a master production schedule (MPS) for said work-in-process from stored data,
• MPS schedule report means for performing the step of generating a master production schedule report from said key stage report and said master production schedule following only Due_Date data for said work-in-process,
• WIP distribution matrix means for performing the step of generating a work-in-process distribution matrix for integrating said master production schedule report with work-in-process quantity data within a deliverable cycle time,
• allocation means for performing the step of allocating selected lots from said work-in-process distribution matrix using a snake pattern method to allocate said selected lots from said matrix,
• rescheduling means for performing the step of changing the due date for said selected lots of said work-in-process selected by said snake pattern method, and
• re-scheduling table means for performing the step of generating a final re-scheduling table for said work-in-process including said selected lots.

A system for performing dynamic re-scheduling of priorities of work-in-process in a fabrication plant for manufacturing of a product comprising:

• reading means for performing the step of reading a key stage report for said work-in-process and a master production schedule (MPS) for said work-in-process from stored data,
• MPS report means for performing the step of generating a master production schedule report from said key stage report and said master production schedule following only Due_Date data for said work-in-process,
• matrix means for performing the step of generating a work-in-process distribution matrix for integrating said master production schedule report with work-in-process quantity data within a deliverable cycle time,
• allocation means for performing the step of allocating selected lots from said work-in-process distribution matrix using a snake pattern method to allocate said selected lots from said matrix,
• change means for performing the step of changing the due date for said selected lots of said work-in-process selected by said snake pattern method, and
• re-scheduling means for performing the step of generating a final re-scheduling table for said work-in-process including said selected lots, where ∑ X = 1 , Y = 1 X = n , Y = 3 ⁢ MPSR ⁢ ⁢ ( Due — ⁢ Date ⁢ ⁢ ( X ) , CT ⁡ ( Y ) ) = Designed ⁢ ⁢ Out CT = Cycle ⁢ ⁢ Time X = 1 , 2 , 3 ⁢ ⁢ … ⁢ ⁢ m Y = 1 , 2 , 3 ⁢ ⁢ … ⁢ ⁢ p
• where m and p are positive integers and MPSR=Master Production Schedule Report.
• Due_Date data means for performing the step of using said Due_Date data in allocating said selected lots,
• link means for performing the step of using a link with products in allocating said selected lots,
• theoretical process time means for performing the step of using theoretical process time to make an exact re-scheduling automatically to ensure linear wafer output performance in allocating said selected lots, and
• fitting means for performing the step of fitting work-in-process in said key stage report to meet requirements of said master production schedule when forming said revised master production schedule.