Patent ID: 7054703
Filing Date: 2006-05-30
Classification: G05B,Y02P

Abstract:
1. A control system for managing a production schedule having time constraints that define a maximum elapsed time between operations, comprising: a calculation unit configured to define a plurality of sub-time constraints between each two operations of the production schedule, generate a plurality of equations representing functions of the time constraints and the sub-time constraints, and calculate a value for the sub-time constraints with the equations; and a determination unit configured to define a status for each operation according to a Work-In-Process (WIP) quantity between a first operation and a checked operation of the production line and a throughput rate of the checked operation, check whether the status violates any of the sub-time constraints between the first operation and the checked operation, and release a lot into the production line if the status for each operation satisfies the corresponding sum of the sub-time constraints.