| Summary: | 碩士 === 國立屏東科技大學 === 工業管理系所 === 97 === GERT networks have been widely applied in different domains. The parameters of GERT networks are usually determined by the decision makers’ subjective opinions or experts’ suggestions. It implies that the values of parameters in GERT networks are imprecise and uncertain. However, traditional GERT networks cannot reflect the characteristics of real-world network problems. To overcome the above weakness, this paper attempts to use fuzzy numbers to represent the duration’ values, and then develops a Fuzzy GERT model. The developed fuzzy GERT model includes three procedures: (1) draw the GERT network based on system analysis, (2) use triangular fuzzy numbers to represent the parameters’ values in the GERT network and (3) apply the operations of triangular fuzzy numbers to formulate the Fuzzy GERT model. After the experimental test of the model the research proposed, the results obtained by triangular fuzzy number is better than that obtained by α-cut. The model to used evaluate project duration is feasible.
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