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Solved by Expert Tutors
Question

1) Develop a project network diagram that shows all the activities and precedence relationships. (10 marks)

2) Determine the project length (without crashing). (4 marks)

3) Determine the critical path activities. (2 marks)

4) What is the shortest time that the project can be finished if crashing is allowed? (4 marks)

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Lance, after years as a successful engineering career, has decided to pursue his
lifelong dream of opening a photography business. Lance has been dabbling in
photography for a number of years and has become quite the master. His
primary products include pictures of the Australian outback. Lance has been
selling his products at local markets, arts and craft fairs, and at local businesses.
Business has been picking up significantly and Lance feels that now is the time to
launch a website for his business. Lance wants a website that will showcase his
products, allow secure online ordering, and has social media capability. In
addition, Lance would like to provide videos on the process of taking amazing
photos. The videos will be free for a two week period and then there will be a
nominal monthly subscription fee. This monthly fee will allow one to watch
unlimited videos and download samples of his work. Lance wants to add enough
videos to get the subscription service started and then he will add additional new
videos each month.
He contacts Leigh, a family friend, who owns a software and website
development business. They meet for lunch and Lance gives her all the specific
requirements for the website. Lance would like to have a website launched in
less than three weeks. He will be a vendor at a large art show in six weeks and
wants a website in place so potential visitors can peruse his products prior to the
show. Leigh is happy to help Lance with the website and carefully takes notes of
all his website requirements. She tells Lance that she needs to estimate how long
the website project will take given that she and her employees are in the midst of
several projects. However, she promises that she will try her best to have the
project completed within three weeks. Lance tells Leigh that he is willing to pay
extra in order to have the website completed within a three week period.
Leigh goes back to her office and puts together the project activities, the time to
complete each activity, and whether an activity time can be reduced (crashed) by
hiring additional workers. She does not want to begin shooting videos for the
subscription service (Activity J) until the videos for photography are complete
(Activity B). Table 1 provides the activity, description, time to complete an
activity, predecessors, and the maximum amount that an activity can be crashed
(completion time reduced). Leigh needs your help. Her project management
expert is on vacation this week.
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Table 1
Activity
Description
Predecess
Est. Time
Max crash
or
(days)
amount
A
Sample pictures
3
1.5
B
Videos on how to take
5
3
pictures
C
Design of the website and
2
1
main page
D
Design of the website and
N
1
catalogue
E
Design of the website
ordering systems
F
Completion of the website
A B, C
2
main page which includes
pictures and videos
G
Review and changes of the
F
1
0
website main page
H
Completion of the product
A, B, D, E
2
1
catalogue and ordering
systems
Review and changes to the
H
1
0
product catalogue and
ordering systems
Videos for the subscription
B
15
5
system
K
Design of the website
J
2
subscription section
L
Social media
J
2
M
Final website integration,
G, I, K, L
O -
review and changes

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