Abstract
ABSTRACT 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 weaknesses, this paper attempts to use fuzzy numbers to represent the parameters' 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. To validate the proposed fuzzy GERT model, one numerical example based on an existing GERT network has been adopted.
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