Egon Spengler is planning a charity benefit gala for his “Save the City” campaig
ID: 336672 • Letter: E
Question
Egon Spengler is planning a charity benefit gala for his “Save the City” campaign. However, because one of his partners, Peter Venkman, has difficulty staying on task, the project is scheduled and they are running out of time. Egon has used project management principles to lay out the task relationships and he finds that if they follow the traditional schedule, as outlined below, they will not have enough time to get everything done before the weekend of the gala. Egon has created a list of tasks, their time requirements, and their relationships. He has also begun a network diagram, but needs to know what to do next. He knows that he needs to reduce the total time by four weeks.
Activity
Duration (weeks)
Crash Time (weeks)
Description
Preceding Activity(ies)
Crashing Cost/Week
A
7
Determine gala theme
-
B
5
Reserve portal location for gala
A
C
7
6
Create Marketing Plan
B
$1,500
D
6
3
Ray Parker, Jr. to audition musical acts
B
$1100
E
6
4
Determine ticket sales method
C
$1,000
F
7
4
Purchase supplies, including Stay Puff marshmallows
C
$750
G
4
3
Pick musical act and sign contract
D
$250
H
4
2
Sell tickets in person
E
$500
I
5
4
Sell tickets online
E
$1250
J
1
Gala!
H, I, F, G
I put in Bold what I think is right for the first 6 questions, I don't understand the last 4
1)What is the slack time for activity H?
a)1
b)2
c)9
d)12
2)What is the earliest start time for activity C?
a)10
b)12
c)27
d)30
3)What is the latest finish time for activity G?
a)18
b)22
c)26
d)30
4)Which of the following is the critical path at the beginning of the analysis?
a)ABCFJ
b)ABDGJ
c)ABCEIJ
d)ABCEHJ
5)What is the first activity that Egon should crash?
a) C
b) D
c) E
D) F
e) I
6)Activity E can be crashed how many times?
a) 0
b) 1
c) 2
D) 3
e) Infinite
7)What is the minimum completion time for the project after crashing (until no more crashing is possible)?
a) 23 weeks
b) 26 weeks
c) 27 weeks
d) 29 weeks
8)If Egon has a budget of only $2,000 for crashing costs, what is the shortest possible completion time?
a) 29 weeks
b) 30 weeks
c) 31 weeks
d) 32 weeks
9)How much will it cost Egon to reduce the original total project time by four weeks ?
a) $2,000
b) $3,250
c) $4,000
d) $4,750
10)How much did crashing that last (fourth) week cost Egon?
a) $750
b) $1000
c) $1,250
d) $1,500
Activity
Duration (weeks)
Crash Time (weeks)
Description
Preceding Activity(ies)
Crashing Cost/Week
A
7
Determine gala theme
-
B
5
Reserve portal location for gala
A
C
7
6
Create Marketing Plan
B
$1,500
D
6
3
Ray Parker, Jr. to audition musical acts
B
$1100
E
6
4
Determine ticket sales method
C
$1,000
F
7
4
Purchase supplies, including Stay Puff marshmallows
C
$750
G
4
3
Pick musical act and sign contract
D
$250
H
4
2
Sell tickets in person
E
$500
I
5
4
Sell tickets online
E
$1250
J
1
Gala!
H, I, F, G
Explanation / Answer
Assuming ABCEIJ as critical path.
We should crash always the least expensive activity on the critical path first. Also, non-critical activities need not be crashed because crashing them won't reduce project duration.
(7) C - 27 weeks
Minimum possible duration of the project after crashing:
Current duration - Crashing time saved (Crash C = 1 week saved, E = 2 weeks saved, I = 1 week saved)
31 - 1 - 2 - 1 = 27 weeks
(8) A - 29 weeks (31 - 2)
Since, in this case he will be able to crash only E by 2 weeks with $1,000 as crashing cost per week.
(9) D - 1000*2 + 1500 + 1250 = $4,750
(10) D - $1,500
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