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SEMESTER 1 2018 EXAMINATIONS

CVEN9702: PROJECT PLANNING AND CONTROL

Part A – Answer in a Separate Booklet

Question 1 (25 marks)

(a) Draw a precedence diagram for the project for which data is given in the

following table.

Activity	Predecessors	Relationship	Lead time	Duration
A	None			8
B	A	FF	4	14
C	A	SS	6	12
D	B	SS	5	16
E	C	SF	4	18
F	B D E	FS FF FF	5 4 3	20

(b) For each activity of the project described in (a) determine the EST, LST, EFT,

LFT, FF and TF. These answers should be written in boxes drawn in

appropriate places on your precedence diagram.

(d) Is the link between activities B and F a redundant link? Why or why not? (Answer in 2 lines or less).

Question 2 (25 marks)

(a) PERT and PNET both assume that the probability distributions describing the activity

times approximate a Beta distribution. However, these two scheduling methods then assume that the probability distributions describing the path lengths in the project approximate a normal distribution. Why is the normality assumption justified? Under what circumstances would the normality assumption be invalid? (Answer in four lines or less.)

(b) Draw an arrow diagram for the project whose activities are summarised in the following

table:

Activity	Follows	Optimistic time	Most likely time	Pessimistic time
A	-	37	40	55
B	-	24	42	54
C	A, B	18	30	36
D	B	20	29	32
E	C, D	15	24	27

You may find the following useful:

m =

ta + 4tm + tb

Cumulative Normal Distribution

Gt2 = tb 6(一) ta 2

Part B – Answer in a Separate Booklet

Question 3 (25 marks)

Graph paper has been provided for your answers to this question.

A project’s activities are summarised in the following table:

Activity	Follows	Duration	Engineers
A	None	3	1
B	None	2	2
C	A	1	4
D	C	2	1
E	C	5	2
F	None	3	2
G	D	1	2
H	G	3	5
I	D	3	1
J	H	2	5
K	J	4	1
L	C	5	4

Graph paper has been provided for your answers to this question.

(a) Construct a resource profile for engineers assuming that all activities start at their

earliest start times. Mark the maximum resource usage on your profile.

(b) Assuming that you only have 5 engineers available, reschedule the activities to fit the

resource limitations. In doing this, arrange your schedule to have minimal impact on the project duration and minimise "hirings" and "firings" as much as possible. Mark the project duration on your profile.

Question 4 (25 marks)

Question 4 should be answered in a different answer book to Questions 1 and 2.

(a) Give two reasons why planning should always proceed from the general to the detailed.

(Answer in 4 lines or less) (4 marks)

(b) Give two reasons why planning carried out at the beginning of a project is more

beneficial than planning carried out towards the end of a project. (Answer in 4 lines or less) (4 marks)

(c) What levels of detail are required in the programs prepared for each of the following: senior managers, middle management, and production management? (Answer in 6 lines or less). (6 marks)

(d) What is the problem with creating a plan that is too detailed at tender time? (Answer in

2 lines or less). (2 marks)

(e) What is the problem with creating a plan that does not have enough detail at tender

time? (Answer in 2 lines or less). (2 marks)

(f) When dividing work into activities, what are the three characteristics that activities

should have? In this question “activities” represent the lowest level of the work breakdown structure. (Answer in 3 lines or less). (3 marks)

(g) In regard to project scheduling, what is a milestone, and why are milestones important

in project control? (Answer in 4 lines or less). (4 marks)