Multi-factory capacity planning in semiconductor assembly and test manufacturing with multiple-chip products

Capacity planning determines the optimal product mix based on the available tool sets and allocates production capacity according to the forecasted demands for the next few months. MaxIt is the previous capacity planning system for Intel´s Flash Product Group (FPG) Assembly & Test Manufacturing (ATM). It only applied to single product family scenarios with simple process routing. However, new Celluar Handhold Group (CHG) products need to go through flexible and reentrant ATM routes. In this paper, we introduce MaxItPlus, which is an enhanced MaxIt using MILP (mixed integer linear programming) to conduct capacity planning of multiple product families with mixed process routes in a multifactory ATM environment. We also present the detailed mathematical formulation, the system architecture, and implementation results. The project will help Intel global Flash ATM to achieve a single and efficient capacity planning process for all FPG and CHG products and gain $10 M in marginal profit (as determined by the finance department)