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Network Scheduling by CPM/IPERT Introduction

This situation can be avoided by checking the precedence relationship of the activities and by numbering them in a logical order.


(2) Dangling :

This situation can be avoided by keeping in mind that all events except the starting and ending event of the whole project must have at least one entering and one leaving activity. A dummy activity can be introduced to avoid this dangling.


(3) Redundancy :The dummy activity is redundant and can be eliminated

(f) Critical Path


It is the longest path in the project network. Any activity on this path is said to be critical in the sense that any delay of that activity will delay the completion time of the project