Question

Please show your work.

Table 7.5 Activity PredecessorTime (da A,B 10 D,E Using Table 7.5, how many days can activity C be delayed without changing the whole project's earliest completion time? O 7 days O 0 days 2 days O 5 days

Answer 1

Answer: Option (A) - 7 days

Solution:

From the given information, the network diagram for the project can be drawn as below:

5 A3 8 lo lo 0 tH 3 NETWORK DIAGRAM 31

From the network diagram, the values of ES, EF, LS, LF can be computed as below:

In the above diagram, we can observe that the ES, EF, LS and LF values for Activity C are as:

Early Start (ES) = 0

Early Finish (EF) = 3

Latest Start (LS) = 7

Latest Finish (LF) = 10

The latest start for Activity C is Day-7, it means that even if the activity C starts on 7th day, it will still get completed on the 10th day without changing the whole project's earliest completion time of 25 days.

Allowable delay in Activity C = Latest Start - Early Start

Allowable delay in Activity C = 7 - 0

Allowable delay in Activity C = 7 days