PROJ 592 – WEEK 6 – QUIZ 2
(CO E) Using the network below and the additional information provided, find
Question 1
(a) the crash cost per day per activity;
(b) which activities should be crashed to meet a project deadline of 12 days at minimum cost; and
20
(c) what the extra cost is to crash the project.
Activity Normal Crash Time Normal Cost Crash Cost
Time
A 5 3 $300 $350
B 3 2 $250 $325
C 6 4 $400 $700
D 5 3 $150 $200
MY ANSWER
(a) Crash Cost Per day Per Activity:
Crash Cost = (Crash Cost - Normal Cost) / (Normal Time - Crash Time)
Activity A = ($350-$300) / (5-3)
= $50/2
Activity A = $25
Activity B = ($325-$250) / (3-2)
= $75/1
Activity B = $75
Activity C = ($700-$400) / (6-4)
= $300/2
Activity C = $150
Activity D = ($200-$150) / (5-3)
= $50/2
Activity D = $25
(b) Which activities should be crashed to meet a project deadline of 12 days at minimum cost?
First, we need to consider the project's Critical Path which is:
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, B-C-D = 3-6-5 = 2 days
and the project's Normal Completion Time which is: (c) what the extra cost is to crash the project
which is: B+C+D = 3+6+5 = 14 days
In this project, Activity D has the lowest crash cost. Therefore, we can crash it by 2 days to
meet the project's deadline of 12 days at minimum cost
(c) what the extra cost is to crash the project?
Extra Cost = Daily Cost for Activity D x Critical Path
= $25 x 2
Extra Cost to Crash Project = $50
(CO E) The following information is extracted from a project to develop a state-of-the-art alternative power energy
Question 2
storage device. 20 pts
Activity Duration Predecessors Resources
A 4 days -- 1 research engineer
B 3 days A 1 test engineer
C 5 days A 1 design engineer
D 2 days A 1 marketing specialist
E 3 days B 1 prototype builder
F 4 days D 1 test engineer
The owner has stipulated that in order to provide continuity throughout the project, the same individual must
handle all activities under his or her discipline. Activities on this project cannot be split.
a. Identify any resource conflicts in the above project. State the activities involved, the timeframe of the
conflict(s), which resources are involved, and the quantity required.
b. Given the owner's stipulation regarding project continuity and the need to minimize project duration,
how can this conflict be resolved? What will be the effect on the project duration?
A. Identify any resource conflicts in the above project. State the activities involved,
the timeframe of the conflict(s), which resources are involved, and the quantity
required.
• The resource conflict in this project is between Activity B and Activity F.
• Activity B would still be ongoing at Day 7 of the project while Activity F is expected
to begin.
• Both activities require 1 Test Engineer during overlapping time periods.
B. Given the owner's stipulation regarding project continuity and the need to minimize
project duration, how can this conflict be resolved? What will be the effect on the project
duration?
Conflict Resolution: Schedule Activity B as a predecessor of Activity F instead and start it on
Day 8.
This study source was downloaded by 100000861168648 from CourseHero.com on 04-07-2023 02:24:12 GMT -05:00
https://www.coursehero.com/file/52418147/WEEK-6-QUIZ-MY-ANSWERSdocx/
(CO E) Using the network below and the additional information provided, find
Question 1
(a) the crash cost per day per activity;
(b) which activities should be crashed to meet a project deadline of 12 days at minimum cost; and
20
(c) what the extra cost is to crash the project.
Activity Normal Crash Time Normal Cost Crash Cost
Time
A 5 3 $300 $350
B 3 2 $250 $325
C 6 4 $400 $700
D 5 3 $150 $200
MY ANSWER
(a) Crash Cost Per day Per Activity:
Crash Cost = (Crash Cost - Normal Cost) / (Normal Time - Crash Time)
Activity A = ($350-$300) / (5-3)
= $50/2
Activity A = $25
Activity B = ($325-$250) / (3-2)
= $75/1
Activity B = $75
Activity C = ($700-$400) / (6-4)
= $300/2
Activity C = $150
Activity D = ($200-$150) / (5-3)
= $50/2
Activity D = $25
(b) Which activities should be crashed to meet a project deadline of 12 days at minimum cost?
First, we need to consider the project's Critical Path which is:
This study source was downloaded by 100000861168648 from CourseHero.com on 04-07-2023 02:24:12 GMT -05:00
https://www.coursehero.com/file/52418147/WEEK-6-QUIZ-MY-ANSWERSdocx/
, B-C-D = 3-6-5 = 2 days
and the project's Normal Completion Time which is: (c) what the extra cost is to crash the project
which is: B+C+D = 3+6+5 = 14 days
In this project, Activity D has the lowest crash cost. Therefore, we can crash it by 2 days to
meet the project's deadline of 12 days at minimum cost
(c) what the extra cost is to crash the project?
Extra Cost = Daily Cost for Activity D x Critical Path
= $25 x 2
Extra Cost to Crash Project = $50
(CO E) The following information is extracted from a project to develop a state-of-the-art alternative power energy
Question 2
storage device. 20 pts
Activity Duration Predecessors Resources
A 4 days -- 1 research engineer
B 3 days A 1 test engineer
C 5 days A 1 design engineer
D 2 days A 1 marketing specialist
E 3 days B 1 prototype builder
F 4 days D 1 test engineer
The owner has stipulated that in order to provide continuity throughout the project, the same individual must
handle all activities under his or her discipline. Activities on this project cannot be split.
a. Identify any resource conflicts in the above project. State the activities involved, the timeframe of the
conflict(s), which resources are involved, and the quantity required.
b. Given the owner's stipulation regarding project continuity and the need to minimize project duration,
how can this conflict be resolved? What will be the effect on the project duration?
A. Identify any resource conflicts in the above project. State the activities involved,
the timeframe of the conflict(s), which resources are involved, and the quantity
required.
• The resource conflict in this project is between Activity B and Activity F.
• Activity B would still be ongoing at Day 7 of the project while Activity F is expected
to begin.
• Both activities require 1 Test Engineer during overlapping time periods.
B. Given the owner's stipulation regarding project continuity and the need to minimize
project duration, how can this conflict be resolved? What will be the effect on the project
duration?
Conflict Resolution: Schedule Activity B as a predecessor of Activity F instead and start it on
Day 8.
This study source was downloaded by 100000861168648 from CourseHero.com on 04-07-2023 02:24:12 GMT -05:00
https://www.coursehero.com/file/52418147/WEEK-6-QUIZ-MY-ANSWERSdocx/
