RISKS PRIORITIZATION IN THE INJECTION MOLDING PROCESS USING FMEA METHOD COMPARATED WITH TOPSIS METHOD

In the automotive industry, the injection molding process is frequently used as a result of the massive market penetration of plastic products. For this reason, establishing risks and preventing them is a permanent concern of quality management and more. To prioritize these risks, a series of models and methods established by research in the field are applied. Two case studies are presented in the paper to evaluate and rank the failure modes that could occur in the plastic injection process. In the first, the classic FMEA method is used and in the second, the TOPSIS method. Failure mode and effect analysis (FMEA) is one of the well-known quality management techniques that is used for continuous improvement of product or process design. The approach proposed by the method is simple, but there are some limitations in obtaining a good estimate of failure rates. Thus, a new risk assessment system based on the TOPSIS theory is needed, at the end of the paper comparing the results obtained by the two methods. This paper can also serve as a guide to prevent failures of injection molded parts.