fuzzy network analysis for projects with high level of risks – uncertainty in time and structure

نویسندگان

reza morovatdar phd student at the department of industrial engineering, k.n.toosi university of technology, tehran, iran

abdolah aghaie is associate professor at the department of industrial engineering, k.n.toosi university of technology, tehran, iran

simak haji yakhchali assistant professor at the department of industrial engineering, college of engineering, university of tehran, tehran, iran

چکیده

in order to have better insight of project characteristics, different kinds of fuzzy analysis for project networks have been recently proposed, most of which consider activities duration as the main and only source of imprecision and vagueness, but as it is usually experienced in real projects, the structure of the network is also subject to changes. in this paper we consider three types of imprecision namely activity duration, activity existence and precedence relation existence which make our general fuzzy project network. subsequently, a corrected forward recursion is proposed for analysis of this network. since the convexity and normalization of traditional fuzzy numbers are not satisfied, some corrected algebraic operations are also presented. employing the proposed method for a real project reveals that our method results in more applicable and realistic times for activities and project makespan in comparison to classic fuzzy pert.

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عنوان ژورنال:
international journal of industrial engineering and productional research-

جلد ۲۲، شماره ۱، صفحات ۷۳-۸۲

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