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Delphi Triangular Fuzzy Cognitive Map (DTFCM)

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Delphi Triangular Fuzzy Cognitive Map (DTFCM) A. Praveen Prakash, N.Vanathi Professor in Mathematics, Assistant professor in Mathematics, Hindustan University, KCG College of Technology, Chennai Chennai apraveenprakash@gmail.com Vanathi@kcgcollege.com Abstract: In this paper the new fuzzy model Delphi Triangular Fuzzy Cognitive Map (DTFCM) is introduced. Multiple experts’ opinion is collected and using Delphi method the decision matrices are combined and obtained as a triangular fuzzy matrix. Decision matrix with triangular fuzzy numbers is analysed by fuzzy cognitive map. In addition as a numerical example analysis of occupational hazards of traffic police due to noise pollution is analysed to demonstrate …show more content…

The Delphi method was explored in 1950 by the RAND Corporation (Dalkey, 1969)[6]. This method includes survey conducted in two or more rounds. After each round, the researcher will give the results of the previous round so that experts can review or retain their original answers. Questionnaires carried out separately and the experts do not know each other. This method is often perceived to create a better interaction within the group (Rowe, 1991). The Delphi Method has been widely used to obtain a constant flow of expert opinions through survey. Questions come from related literature and those recommended by experts. Murray et al.[9] proposed to apply the Fuzzy Delphi method to group decisions. This method is based on a similarity function to assess the level of agreement between experts. The Fuzzy Delphi Method has assured no misinterpretation of expert opinions since it considers the fuzziness that every survey process has to deal with. Thus, more objective evaluation factors can be determined through statistical analysis since the efficiency and quality of questionnaires are enhanced .Some of the more representative strengths of the Fuzzy Delphi Method are: time saving, fewer surveys, increased recovery rate, and guarantee of completeness and consistency of the group opinion .Generally speaking, the fuzzy Delphi method is better than the Delphi method because it has the following advantages: (i) Reducing number of surveys required (ii) By applying the fuzzy theory to clarify invertible fuzziness in interviews with experts to obtain more reasonable and proper responses (iii) Achieving higher economic effectiveness in time and costs required to conduct

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