Value stream mapping and fuzzy decision making an application criteria and evaluation of alternatives process

Companies need to be able to make a profit from their sales in order to survive. The importance of reducing the costs of products produced in an environment determined by the sales market is increasingly important. There are many inputs that make up the cost of the product, but not all of them have value on the product. Value adding and non-adding works can be determined by value stream mapping method which is one of the methods in lean production. After this determined situation, a new process is designed in which there are works that add value to production. In this study, the application of fuzzy value stream mapping method in production areas where uncertainties are high is aimed to prevent wastes and to realize more efficient production. In the application made in a company manufacturing folding boom cranes in Konya, the current situation map was created and wastes were observed. The most effective lean production method has been chosen in order to eliminate wastes. Fuzzy analytic hierarchy process (FAHP) method was used during the selection of the method. A future status map is designed with Kaizen improvements. Thanks to the new production system installed in the assembly area in the company, the production capacity of the assembly line was increased by providing a significant reduction in waste