Patent ID: 6622055
Filing Date: 2003-09-16
Classification: G05B,G06Q,Y02P

Abstract:
A method of control and management of a production line, the method comprising:providing a target of a number of semi-manufactured wafers to be finished for today (Target); calculating a number of semi-manufactured wafers still required so far today by deducting a number of semi-manufactured wafers that have been produced so far today (Move) from the target of the number of semi-manufactured wafers (Target), that is, calculating a result of (Targetâˆ’Move); calculating a number of semi-manufactured wafers that a machine can still produce for today (UPH*HRs), wherein UPH is a throughput of one machine, and HRs is remaining working hours for today; calculating a number of required machines to achieve the target of the number of semi-manufactured wafers today by [(Targetâˆ’Move)/(UPH*HRs)]; calculating an index of equipment Ieq by dividing a number of available machines current (PUs) with a number of machines required to achieve a target throughput, that is, Ieq=PUs/[(Targetâˆ’Move)/(UPH*HRs)], and â€ƒaccelerating an on-line speed of the machines when the index of equipment is less than 1.0.