DEVELOPMENT OF A FUZZY MULTI OBJECTIVE INVENTORY CONTROL MODEL
The present article presents an inventory control model of several goods with the purpose of minimization of total cost and minimum employment of manpower, under limitations of maximum warehouse space, maximum investment power, amount of permissible shortage in each period and quantity of periodical orders; the latter two limitations have been considered at intervals. Shortage is permissible in the presented model, the preparation time is zero and the parameters of demand, cost (including: commissioning, maintenance, shortage) and resources of limitations are fuzzy. The fuzzy numbers of demand and cost are triangular and numbers of resources of limitations are of positive trapezoidal type. In order to solve the model, first each one of the functions of the intended target is converted into three objective functions and limitations are changed to final limitations through defuzzification method. Then the resulted deterministic multipurpose model is solved through Fuzzy Non-Linear Programming (FNLP) method. At the end, a numerical example is solve and presented to analyze the model by Lingo Software.
