Fuzzy approaches to the production problems: the case of refinery industry

The fuzzy principle states that everything is a matter of degree. So far, many business production problems are solved by operational research optimization techniques, under the considerations of some assumptions. In the current literature, we still have several applications of fuzzy linear, integer, goal and other programming applications. The main aim of the study is to add a new application to the literature and to solve the refinery production problem by using fuzzy principles. In application, the real refinery model has been developed and an alternative fuzzy model solution has been criticized to determine which one is better. Finally, comparing the classical solution with one of the obtained best solutions of the fuzzy models, one can obtain more suitable output of the models than the traditional methods.