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SEMESTER 1 2017 EXAMINATIONS

CVEN9702: PROJECT PLANNING AND CONTROL

Part A – Answer in a Separate Booklet

Question 1 (25 marks)

Activity	Original Planned Start	Original Planned finish	Percent complete	Original Planned cost	Amount spent
A	0	6	100%	$6,000	$5,000
B	6	12	100%	$7,000	$10,000
C	6	18	100%	$10,000	$7,000
D	12	20	100%	$8,000	$5,000
E	18	22	100%	$4,000	$6,000
F	20	24	50%	$6,000	$4,000
G	22	28	0%	$6,000	$0
H	24	28	0%	$9,000	$0
I	28	30	0%	$3,000	$0

For the project whose activities by day 20 are summarised in the above table (referring to the whole project not just the individual activities):

(a) Determine the basic cost of work scheduled.

(b) Determine the basic cost of work performed.

(d) Determine the cost variance.

(e) Is the project over or under budget?

(f) Determine the schedule variance.

(g) Is the project ahead or behind schedule?

(h) Calculate the time variance.

Question 2 (25 marks)

Start Finish

The above network represents the logic for a project with uncertain activity durations. The duration of Activity A has a normal probability distribution with a mean of 10 days

and a standard deviation of 4 days.

The duration of Activity B has a normal probability distribution with a mean of 6 days

and a standard deviation of 2 days.

The duration of Activity C has an exponential probability distribution with a mean of 15

days.

‘Start’ and ‘Finish’ activities are dummy activities with zero durations.

(a) Perform 10 simulation runs for the above network using the Monte Carlo simulation

technique. A table of random numbers is attached for this purpose. Identify the critical path in each simulation run. Your answer should be presented in tabular form.

(b) What is the criticality index for activity C?

F(x) = 1 – e-x/入

Z1 = cos(2U2 )

Z2 = sin(2U2 )

Part B – Answer in a Separate Booklet

Question 3 (25 marks)

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

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

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)

(a) What is the term for the amount of payment deducted from a contractor that takes

longer to complete a project than is allowed in the contract? (Answer in 2 lines or less) (2 marks)

(b) When is an extension of time granted? (Answer in 4 lines or less). (3 marks)

(c) The lecture notes states: “Acceleration may be instigated by the contractor or requested by the owner.” What special issue arises if the acceleration is instigated by the contractor? (Answer in 2 lines or less). (2 marks)

(d) What special issue arises if the acceleration is requested by the owner? (Answer in 2 lines or less). (2 marks)

(e) An owner and contractor enter into a contract that stipulates that the owner will hand

over the site to the contractor on the 15th of January and that the project is to be finished by the 15th of December. The contractor prepares a programme based on these dates with two weeks of contingency. That is, the contractor’s program indicates the project will be finished by the 1st of December. The owner is one week late in handing over the site, so the contractor cannot start until the 22nd of January. The contractor claims a one week extension of time because it was a delay caused by the owner. The owner rejects this extension of time because “the contractor has two weeks of contingency and so can still finish on time” . Which party is wrong in this circumstance and why? (Answer in 4 lines or less). (5 marks)

(f) The same contract in the above question stipulates that the owner will provide the tiles

for the bathrooms to the contractor on the 15th of February. The contractor’s programme indicates that the tiles will be installed on the 15th of March. The owner actually supplies the tiles on the 22nd of February. The contractor claims a one week extension of time because it was a delay caused by the owner. The owner rejects this extension of time because “the contractor has provided a programme showing that there was at least 4 weeks of float for the supplying of these tiles” . Which party is wrong in this circumstance and why? (Answer in 4 lines or less). (5 marks)

(g) A particular project has had many delays. Some were caused by the owner, while others

were caused by the contractor. Many of the delays occurred simultaneously. The contractor has claimed for an extension of time for every delay that was caused by the owner, but many of these claims were rejected. The parties decide to calculate the total extension of time after the project finishes. Which of the following two methods is most likely to maximize the calculated delay caused by the owner, ie the extension of time?

Impacted as planned method, with owner caused delays added

Collapsed as-built method, with owner caused delays subtracted

Why? (Answer in 4 lines or less) (3 marks)

(h) The lecture notes states: “If a project is delayed due to delays caused by the owner then

the owner will usually be required to pay costs. However, if a breach of contract is involved then the owner will be required to pay damages.” What is the difference in this case between costs and damages (Answer in 6 lines or less). (3 marks)