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Factory production schedulers often face a difficult problem after determining that changes in customer orders or critical component availability have affected a production plan's feasibility. They then require a tool to help them determine which of the many feasible schedules is “best.” IRAM (the Intraworks Resource Allocation Model) is a personal computer (PC)-based interactive optimization tool that is usable by these planners. It takes advantage of a recently developed resource allocation algorithm that solves large-scale problems very quickly. This paper describes the two main efforts that produced a successful optimization tool from the original theoretical model. First, significant extensions added necessary modeling features to the algorithm while retaining its speed and ability to solve multiperiod planning problems. Second, a user interface was developed to simplify evaluation and change of proposed solutions. As a result, IRAM facilitates the real-time evaluation of numerous alternative schedules. |
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