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The activity-on-arrow network of activities for a construction project is shown in the figure. The durations (expressed in days) of the activities are mentioned below the arrows. The critical duration for this construction project is

The activity-on-arrow network of activities for a construction project is shown in the figure. The durations (expressed in days) of the activities are mentioned below the arrows. The critical duration for this construction project is Correct Answer 15 days

Concept:

TiE  = Early start time 

TjE = Early Finish time 

TiL  = Latest start time 

TjL = Latest Finish time - 

tij = Duration of the activity

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TjE = TiE +​ tij  

TjL  = TiL + tij   

Calculation:

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The critical duration is 15 days which is observed along the path P – Q – T – W – X which is the critical path of the project.

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