Project Selection of Six Sigma Using Group Fuzzy AHP and GRA

그룹 Fuzzy AHP와 GRA를 이용한 식스시그마 프로젝트 선정방안

  • Yoo, Jung-Sang (Department of Industrial Engineering, Gachon University) ;
  • Choi, Sung-Woon (Department of Industrial Engineering, Gachon University)
  • 유정상 (가천대학교 산업경영공학과) ;
  • 최성운 (가천대학교 산업경영공학과)
  • Received : 2019.10.22
  • Accepted : 2019.11.20
  • Published : 2019.11.28


Six sigma is an innovative management movement which provides improved business process by adapting the paradigm and the trend of market and customers. Suitable selection of six sigma project could highly reduce the costs, improve the quality, and enhance the customer satisfaction. There are existing studies on the selection of Six Sigma projects, but few studies have been conducted to select the correct project under an incomplete information environment. The purpose of this study is to propose the application of integrated MCDM techniques for correct project selection under incomplete information. The project selection process of six sigma involves four steps as follows: 1) determination of project selection criteria 2) calculation of relative importance of team member's competencies 3) assessment with project preference scale 4) finalization of ranking the projects. This study proposes the combination methods by applying group fuzzy Analytical Hierarchy Process (AHP), an easy defuzzified number of Trapezoidal Fuzzy Number (TrFN) and Grey Relational Analysis (GRA). Both of the weight of project selection criteria and the relative importance of team member's competencies can be evaluated by group fuzzy AHP. Project preferences are assessed by easy defuzzified scale of TrFN in case of incomplete information.)


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