Hierarchical production planning in a fuzzy environment

In production planning when product price and capacity, unit cost and market demand are fuzzy the ordinary linear programming could not lead us to optimal solution. The fuzzy linear programming (FLP) is applied for solving the hierarchical production planning (HPP) problems. This study developed fuzzy aggregate production planning (APP) to fuzzy hierarchical production planning. Fuzzy constraints are applied for increasing flexibility and compatibility among different levels of hierarchical model. A procedure for the solution is developed and investigated by a numerical example. The proposed procedure confirms better results also increase the feasibility of hierarchical problem

Keywords:

Fuzzy sets , linear programming , Fuzzy linear programming , Hierarchical production planning