Question

We draw up a precedence relationship among the tasks, based on experience/advice. For example, we are told that task C (producing promotional material) can be started only after obtaining copyright permission for images/blurbs to be used and after designing the promotional material.

Task	Description	Immediate Predecessor	Expected Time weeks
A	Author prepares manuscript	None	30
B	Design promotional material	A	6
C	Produce promotional material	B, G	4
D	Copy edit manuscript	A	5
E	Proofread and correct page proofs	D	10
F	Produce final book	E, G	8
G	Obtain legal permission and copyrights	A	14
H	Conduct sales training meeting	C, F	2

1. Draw diagram.
2. Expected project completion time in weeks is?
3. What is the Critical Path?

True or False

4. The predecessors for F are A, D, E and G?
5. Tasks C & F cannot be performed simultaneously?
6. If one person is responsible for both tasks B and D, those tasks would be called independent?
7. The tasks that determine the overall project duration are A-D-E-F-H?
8. If ‘D’ is delayed by 2 weeks, the expected project completion time increases by 2 weeks to 57 weeks?

Answer 1

Path	Duration
A-D-E-F-H	55
A-B-C-H	42
A-G-C-H	50
A-G-F-H	54

Expected project completion time = Duration of the longest path = 55 weeks

Critical path is the longest path which is A-D-E-F-H

The predecessors for F are A, D, E and G?

True.

Although E, and G are immediate predecessors and A and D precedes D and G respectively

Tasks C & F cannot be performed simultaneously?

false.

Tasks C & F can be performed simultaneously

If one person is responsible for both tasks B and D, those tasks would be called independent?

False

If one person is responsible for both tasks B and D, those tasks would be called dependent

The tasks that determine the overall project duration are A-D-E-F-H?
True.

A-D-E-F-H is the Critical path

If ‘D’ is delayed by 2 weeks, the expected project completion time increases by 2 weeks to 57 weeks?

True.

As D is a critical activity, delaying D by 2 weeks will increase the expected project completion time by 2 weeks to 57 weeks