Since Taylor's science management, it was sought for all methods on production and operation. There are several methods to come out, such as Order Point, Economic Order Quantity, MRP material resources plan, JIT Just In Time, etc. 自泰勒的科学管理后,人们寻求各种优化生产与运作的方法,出现了订货点法、经济订货批量法、物料需求计划方法、准时生产制等。