Activity Duration (weeks) Crash Time (weeks) Description Preceding Activity(ies)
ID: 2747581 • Letter: A
Question
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 What is the first activity that Egon should crash? A. C B. D C. E D. F E. I 3 points Saved QUESTION 22 Activity E can be crashed how many times? A. 0 B. 1 C. 2 D. 3 E. Infinite 3 points Saved QUESTION 23 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 3 points Saved QUESTION 24 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 3 points Saved QUESTION 25 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 3 points Saved QUESTION 26 How much did crashing that last (fourth) week cost Egon? A. $750 B. $1000 C. $1,250 D. $1,500Explanation / Answer
Crash time and crash cost
NT = normal time to complete an activity NC = normal cost to complete an activity CT = crash time to complete an activity,
that is, the shortest possible time it could be completed in.
CC = crash cost - the cost to complete the activity if it is performed in it’s shortest possible time.
Parameters for crashing
maximum time reduction for an activity = NT – CT
cost to crash per period CC – NC
= ----------- NT - CT
Act.NT NC CT CC A 7 3000 4 6000 B 3 4000 2 5500 C 4 15000 2 20000 D 8 10000 5 19000 E 9 7000 6 9100
Act.NT
A 7
B 3
C 4
D 8
E 9
Act.NT
Max Red
7-4 = 3 3-2 = 1 4-2 = 2 8-5 = 3 9-6 = 3
NC CT CC 3000 4 6000 4000 2 5500 15000 2 20000 10000 5 19000 7000 6 9100
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