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Authors: Erimas Tesfaye Kidist Girma Eshetie Berhan Birhanu Beshah
Publish Date: 2015
Volume: , Issue: , Pages: 133-145
Abstract
Estimation of time in project that involves several activities requires expert’s knowledge to give an accurate estimation of project duration In most project Program Evaluation and Review Technique PERT are used to estimate completion time of project with the basic assumption of normality This assumption is accepted by many scholars without assessing the errors in the result Thus this paper examines the validity of this assumption for activities with different probability distribution functions The effect on the project’s completion time is addressed by considering a single probability distribution for the entire activities of a network and mixed probability distribution functions within the network using a computer based simulation called ARENA in Villa house construction project The findings show that the project completion time for activities that follow different probability distribution function do not follow normality
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