A Dispatching Algorithm for Wafer Fabrication at Orlando.

This memorandum describes a dispatching algorithm for wafer fabrication in Clean Room OR-I at Orlando. This algorithm is a first step towards the "PULL" mode of running the clean room. Its development and integration into the process control system at Orlando is part of the Orlando Bold Initiative. The purpose of the dispatching algorithm is to make sure that important facilities in the clean room are smoothly fed with work so that they are evenly utilized and do not run out of work frequently. This algorithm looks at all lots in the clean room and, for each lot, indicates the time (slack) the lot can be delayed in queue or on hold before it is needed at the next important step in its process log.