For purpose of economic order quantity,this paper constructs an operational coefficient order model on the basis of profit-making efficiency and a comprehensive classification order model,by means of the analysis of common inventory order models.

Research on backorders economic order quantity model;

The well-know economic order quantity of inventory management is a stationary ordering policy.

In order to break the assumptions of theoretical model, and make the theory more applicable,ults will follow, starting from the market forecast, and with its results used as the reference for calculating annual demand, this thesis calculated the economic lot size by positive research.

According to these three cases,mathematical model was set up and the problem of assuring economic lot size and the minimum inventory costs could be solved.

The main goal of this paper is to study solution algorithm of economic lot size problems with perishable inventory,basis studying in now available document,calculate amounts big shortcomings,giving that one kind a genetic algorithm specifically for the heuristic method algorithm in the past searching for.