تأثير استخدام الأنشطة الوهمية على شبكات الأعمال : دراسة نظرية تحليلية لطريقة المسار الحرج (CPM)‎

Abstract EN

In business networks (CPM or PERT), it is difficult and sometimes impossible to draw the project network without using dummy activities, that is because the network cannot be drawn according to the conditions used in the drawing process, in the way which achieve the technical conditions, in terms of the sequence of the project activities in reality and as determined by the specialists.

Therefore, an activity or group of dummy activities is used to draw the network according to the drawing rules, in the way which achieve the technical conditions of the activities sequence process.

Here, the difference between those responsible for the drawing process appears in terms of the number of dummy activities used in the drawing process and their location on the drawing (network), this means that it is possible to draw the network for the same project in more than one way, due to the difference in the dummy activities and their locations on the drawing.

This paper aims to study the effects of the difference in the network drawing process on the information that is extracted from drawing the network, according to the critical path method (CPM), how does this affect the number of network paths, how much the critical path has changed on the network, and the impact of the change in these network paths on special times for early and late starting and finishing (ES, LS, EF, LF) of the project activities.

At the end of this study, the effect of the difference in drawing networks was determined on the critical path and the other paths of the network, and all the information that the CPM method aims to conclude from the project network.