A Fuzzy multiple objective decision model to select the significant qualty characteristics of a product

Abstract

Prioritization the significant quality characteristics are considerable area in quality planning process. All quality characteristics of a product can not be measured/ tested incoming department or production line due to resource constraints. This study presents fuzzy multiple objective decision model with resource constraints to select the significant quality characteristics of product. This study starts Design Failure Mode and Effect Analysis (DFMEA) for product failures, and then Quality Function Deployment (QFD) matrix for failure is used to weight the quality characteristics. In QFD matrix, relationships between failure modes and quality characteristics, technical difficulties and costs are defined with fuzzy numbers. Fuzzy multiple objective decision model is conducted to define the fulfilment level for each quality characteristic by achieving two objectives that are maximizing the weights and minimizing the technical difficulties subject to cost. Industrial application is solved with Two-Phase approach for the fuzzy linear programming problems. With this approach, unnecessary measuring/ testing operations and testing investments are eliminated, and consuming of labour time and materials are provided by defining the significant quality characteristics.