Open AccessCalculating the Fuzzy Project Network Critical Path
Author(s) -
Nasser Shahsavari Pour,
Samira Zeynali,
Mansoor Kheradmand
Publication year - 2012
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v1i2.43
Subject(s) - critical path method , path (computing) , fuzzy logic , fuzzy number , ranking (information retrieval) , computer science , mathematical optimization , path length , mathematics , simple (philosophy) , operations research , fuzzy set , artificial intelligence , engineering , systems engineering , computer network , philosophy , epistemology
A project network consists of various activities. To determine the length of project time and the amount of the needed sources, the time of project completion must correctly and exactly be calculated, so the critical path is calculated. The activities on this path have no floating. It means that there is no delay on these activities. As a result the calculation of the critical path in a project network has a special importance. In this paper a simple method for calculation the critical path is proposed. Assignment an exact time on any activity in real world is not correct; So the fuzzy and uncertainty theories are used to assigned a length of time on any activities. In the present study the trapezoidal fuzzy numbers are assigned to the length of activity time, and the total time of the project is also a fuzzy number. In addition, to compare the fuzzy numbers, ranking of fuzzy numbers are used. Finally a practical example will show the efficiency of the method.