A project has the precedence requirements and activity durations shown in the table.After he draws the network,the project manager decides that activities E and F can be represented by a hammock activity.What are the duration and the early start time associated with this hammock activity?
A)13,36
B)7,0
C)13,7
D)7,14

Question

A project has the precedence requirements and activity durations shown in the table.After he draws the network,the project manager decides that activities E and F can be represented by a hammock activity.What are the duration and the early start time associated with this hammock activity? 
A)13,36 
B)7,0 
C)13,7 
D)7,14

Quizplus · Accepted Answer

To create a hammock activity, we need to find the difference between the early start and early finish times of the two activities (E and F) that represent the boundaries of the hammock.

Early start time for E: 14 (minimum of early finish times of A and D)
Early finish time for E: 17 (duration of E is 3)

Early start time for F: 17 (early finish time of E)
Early finish time for F: 20 (duration of F is 3)

Duration of the hammock activity = EF - AE = 20 - 14 = 6
Early start for the hammock activity = AE + (EF - EE) = 14 + (20 - 17) = 17

Therefore, the duration of the hammock activity is 6 and the early start time associated with this hammock activity is 17. The correct answer is option C.

A Project Has the Precedence Requirements and Activity Durations Shown