Patent Number: 7,043,318

Title: Lot start agent that determines quantity and timing for lot starts

Abstract: An automated system is provided in a facility that manufactures m products, where m>0. The system comprises a software object that provides for calculation of one or more bottleneck delta virtual work in process time ("VWIP") values. Each of the bottleneck delta VWIP values represents the amount of time until one of n bottleneck workstations begins to risk starvation, where n>0. VWIP is the amount of time a bottleneck will stay busy processing WIP that will reach the bottleneck in less time than new lot starts will reach the same bottleneck. In at least one embodiment, each of the bottleneck delta VWIP values is calculated as a mathematical function of virtual WIP time for the corresponding bottleneck workstation and a lower control limit for the corresponding bottleneck workstation. In at least one other embodiment, n>2 and the software object provides for calculation of a plurality of bottleneck delta VWIP values. The software object contains program code that provides for the foregoing functionality either directly or by invoking one or more other objects.

Inventors: Barto; Larry D. (Austin, TX), Nettles; Steven C. (Johnson City, TX), Li; Yiwei (Austin, TX)

Assignee: Advanced Micro Devices, Inc.

International Classification: G06F 19/00 (20060101)

Expiration Date: 5/09/02018