الفهرس 
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Abstract
in Alexandria, Malha District, where the results from validation indicated that the model is
credible and can be used in estimating time, unit cost and average productivity for road
construction operations. Based on simulation methodology using (EZStrobe) program and
analytical data inputs using fractional factorial method accordingly, the productivity
variation resulting from the simulation of different 27 scenarios in two methods can
identify the benefits of advanced systems using GPS.