The subject of the main production schedule is the specific product in production lines, known as the final product (End Item). The final product is usually independent demand items. The meaning of the final planning objects is not the same, due to the different sales environment. The MPS(Main Production Schedule ) is vary due to the different production method, here introduce several commonly used production methods:
1. Make-to-Stock (MTS) : usually the products in direct sales circulation .
2. Make-to-Orde (MTO) and Configuration to Order CTO) : the final products are generally the standard stereotypes products or products designed to the requirements of orders, usually the final products are in 0 layer of the product structure.
3. Assemble to Order (ATO). The products are modular structured, can be in a variety with choice, we use the final assembly schedule (FAS) Schedule to arrange manufactured products, the development of common parts, use the MPS and BOM to make plan on the basic components, optionals and multilayers.
Make-to-Stock and Make-to-Orde are widely applied in production of China; at the same time, for production planning purposes, there are no essential differences between MTS and MTO . Therefore, in the WERPTS environment, use the universal MTS as the typical production method to build production management systems. There are 2 styles of Schedule in the MTS and MTO: fixed period Schedule and rolling Schedule.
Fixed period Schedule is the primary mode of some enterprises. Each time, characterized by a relatively fixed time, develop the next planning cycle production Schedule. Planning cycle of the traditional manufacturing enterprises are mostly quarter or month, as companies gradually increase the ability to the response of the market, the monthly Schedule and weekly Schedule has become a major planned way in modern manufacturing enterprises.
Rolling Schedule is a plan raise in recent years, it was originally used for the preparation of long-term planning, such as variety product development plan. This Schedule combine the long-term Schedule and short-term Schedule, with the passage of time and changes of objective conditions, long-term plan is amended, while short-term Schedule is developed to has a long-term goal.
Rolling Schedule increase the planning cycle by the roll of Schedule , make it is possible to coverage its long production cycle. In addition, the method is revised according to the changes in external conditions and the implementation of the plan. Through the dynamic Schedule, will become pre-control on part after the control, reduce the afterwards coordination work, and improve the passive situation of the original Schedule.
In view of the above advantages of the rolling Schedule, the ERP software part in the ERPWTS, we select Make-to-Stock on production, and choose rolling Schedule as the model.