Fuzzy lineer programming and a study about production planning

In this study one of the models of fuzzy decision making that is fuzzy linear programming model is examined. The scope of the production planning is making decisions about determining the production levels, quantity of operators, stock levels to satisfy the uncertain order . When one of the production planning model is used, objectives and model inputs (orders and sources) are supposed to be certain. But , pratically orders, sources and costs are generally uncertain and fuzzy. And also , in this study production planning problem is in a fuzzy case. In the first part of the study, the basic concepts of fuzzy logic is introduced. In the second part, the basic operations in fuzzy sets and its features are given. In the third part, it is tried to explain the solution approaches of the fuzzy linear programming problems. In the fourth, the approach for solving the fuzzy linear programming problems are explained. In the last part, linear and fuzzy linear programming solutions of a production planning problem belonging to a company are taken place. Key words : fuzzy logic, fuzzy numbers, fuzzy linear programming, production planning