Two-Level Genetic Optimization of Production Planning and Scheduling in Multi-machine Group Production System

Based on an optimal model of production-amount and job sequencing of a two-stage group production system, amathematic model forturnout and job sequencingwithmulti-product andmulti-machine is proposed. In accordance with the feature of the proposed model, it is solved with a two-level genetic optimization method that combines binary-coding and order-coding. An example is presented, and the simulation result verifies the efficiency of the method.