What is the estimated mean time for activity E?
A)91 days
B)99 days
C)100 days
D)101 days
E)115 days

Question

What is the estimated mean time for activity E?
A)91 days 
B)99 days 
C)100 days 
D)101 days 
E)115 days

Quizplus · Accepted Answer

Activity E has two possible paths: A-D-E or B-C-E. Both paths have a duration of 50 days for the first two activities (A/B and D/C). Therefore, the critical path depends on activity E. The duration of activity E is the sum of the durations of its predecessors (either A-D-E or B-C-E).

For path A-D-E: the duration of activity E is 51+9=60 days.

For path B-C-E: the duration of activity E is 49+66=115 days.

Since path B-C-E has a longer duration, it is the critical path and the estimated mean time for activity E is 115 days. Therefore, the best choice is D.

What Is the Estimated Mean Time for Activity E