Fuzzy Critical Path Method in Interval-Valued Activity Networks
نویسندگان
چکیده
Critical Path method (CPM) is widely used in project scheduling and controlling. In conventional project scheduling problem, the crisp numbers are used for the activity times. But in reality, in an imprecise and uncertain environment, it is an unrealistic assumption. To represent the uncertainty involved we have considered the interval-valued numbers to represent the activity times. In this paper, we compute project characteristics such as earliest times, latest times and float times in terms of intervals. In this method, we introduce a new approach to find latest times by removing negative intervals times which can be generated by other methods. Also a new fuzzy critical path method based on the fuzzy theory is developed to solve the project scheduling problem under the fuzzy environment. Through a numerical example, calculation steps in this method and the results are presented.
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