Refractured well selection for multicriteria group decision making by integrating fuzzy AHP with fuzzy topsis based on interval-typed fuzzy numbers

Multicriteria group decision making (mcgdm) research has rapidly been developed and become a hot topic for solving complex decision problems. because of incomplete or non-obtainable information,the refractured well-selection problem often exists in complex and vague conditions that the relative importance of the criteria and the impacts of the alternatives on these criteria are difficult to determine precisely. this paper presents a new model for mcgdm by integrating fuzzy analytic hierarchy process (ahp) with fuzzy topsis based on interval-typed fuzzy numbers,to help group decision makers for well-selection during refracturing treatment. the fuzzy ahp is used to analyze the structure of the selection problem and to determine weights of the criteria with triangular fuzzy numbers,and fuzzy topsis with interval-typed triangular fuzzy numbers is proposed to determine final ranking for all the alternatives. furthermore,the algorithm allows finding the best alternatives. the feasibility of the proposed methodology is also demonstrated by the application of refractured well-selection problem and the method will provide a more effective decision-making tool for mcgdm problems. © 2012 tiejun li et al.