Integration of Fuzzy Logic Algorithms with Failure Mode and Effect Analysis for Decision Support Systems in Product Quality Improvement of Piano Cabinets

The study is a case study of PT Yamaha Indonesia. This company is one of the companies engaged in the production of pianos. One example of a piano cabinet that is exported is the Fall Board cabinet. The Fall Board cabinet is made of wood and has a function as a piano top cover. To produce the cabinet, there are eight processes that the Fall Board goes through. This study focused on how the company is able to control and strive to reduce the rate of process failure that occurs so corrective action is taken in the production process by determining improvement priorities. One effort to determine the types of failures that can arise during the production process is to use the fuzzy logic algorithm approach which is then integrated with the Failure Mode and Effects Analysis (FMEA) approach. Failures are identified by calculating the number of repaired cabinets, for example, the highest failure was the deck with 1,414 units out of 6,260 units. Dekok is a type of failure that results in the paint of the cabinet that has been sprayed peeling off and has a different color. By using the Failure Mode and Effect Analysis (FMEA) which was integrated with the fuzzy method (approach), the priority result of process improvement was the hot press process with the type of failure of uki. This type of failure has the highest Fuzzy Risk Priority Number (FRPN) of 821 and is in the very high category.