The Inventory Improvement Of Production Line Based On Optimization Of Production Schedule For Key Equipment

In the demand structure of varied product with few demand quantity, plastic moldingfactories face on market competition more and more intensely. How to reduce theinventory and the factory's operating cost becomes the key point to see if the factory canlive for long term and keep operating. And at the same time, how to plan and schedule theproduction is very important to factory's inventory management. The thesis analyzed thereasons of long turnover days for products' inventory of P enterprise,10.5%because ofthe shipping schedule postponed from customers' temporary request,70.8%because ofproduction schedule pulled in frequently,11.2%because of Strategy of inventory, and7.5%else. So the production schedule is the Main factor to make the products' inventoryturnover days too long.The thesis analyzed problems which P enterprise met in the process of productionscheduling, including frequent exchange line between two adjacent production job,production scheduling time of many products in the same machine over machine'sworking time limit, etc. In accordance with these problems of production scheduling, thethesis build up related rules of production scheduling according to production machine ofproduct assigned: every product must be producted on assigned machine; buffer timebetween two adjacent production job must be reserved according to the buffer time set upin advance; The daily working time of every machine must fit in with the limit of machine's working time. Based on that, the thesis bring up an improve method to selectthe best production scheduling order to let the total demand of working time be least.After set up the production scheduling rule and improving methord, P enterprise set up aset of production scheduling methord and steps which can be realized, that reduce theinventory turnover days of P enterprise.Through the research to the production scheduling methord of P enterprise, the thesisbuilds up a workable and feasible scheduling methord. This scheduling methord canmeet the production goal of low-cost and high efficiency. Production scheduling as theimportant part of logistic information system, the improvement methord also promotes thelogistic efficiency of both material and finished-pruducts. This production schedulingmethord don't only fit to P enterprise, but also fit to other molding enterprise which faceson diversified and little-demand products.