采用MRPⅡ/JIT混用思想，对生产批量的优化方法、主生产计划编排原则、关键资源计划协调方法、安全提前期的计算等进行了分析研究。
Analysis and study are made on batch optimizing production , main production planning lay-out , important resource planning coordination method and calculation of safety in-advance period with mixed use of MRPII / JIT .
安全提前期