28. A guidance and detection system is being built as part of a large defense project. The detection portion consists of radar and sonar subsystems. Separate equipment is required for each of the subsystems. In each case, the equipment must be calibrated prior to production. After production, each subsystem is tested independently. The radar and the sonar are combined to form the detection system, which also must be tested prior to integration with the guidance system. The final test of the entire system requires complex equipment. The activities and the activity times are Activity Time Required (days) A: Calibrate machine 1 (for radar) B: Calibrate machine 2 (for sonar) C: Calibrate machine 3 (for guidance) D: Assemble and prepare final test gear E: Make radar subsystem F: Make sonar subsystem G: Make guidance subsystem H: Test radar subsystem I: Test sonar subsystem J: Test guidance subsystem K: Assemble detection subsystem (radar and sonar) L: Test detection subsystem M: Final assembly of three systems N: Testing of final assembly 2.0 3.5 1.5 7.0 4.5 5.0 4.5 2.0 3.0 2.0 1.5 2.5 2.5 3.5

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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a. Construct a network for this project.

28. A guidance and detection system is being built as part of a large defense project.
The detection portion consists of radar and sonar subsystems. Separate equipment
is required for each of the subsystems. In each case, the equipment must be calibrated
prior to production. After production, each subsystem is tested independently. The
radar and the sonar are combined to form the detection system, which also must be
tested prior to integration with the guidance system. The final test of the entire system
requires complex equipment. The activities and the activity times are
Activity
Time Required (days)
A: Calibrate machine 1 (for radar)
B: Calibrate machine 2 (for sonar)
C: Calibrate machine 3 (for guidance)
D: Assemble and prepare final test gear
E: Make radar subsystem
F: Make sonar subsystem
G: Make guidance subsystem
H: Test radar subsystem
I: Test sonar subsystem
J: Test guidance subsystem
K: Assemble detection subsystem (radar and sonar)
L: Test detection subsystem
M: Final assembly of three systems
N: Testing of final assembly
2.0
3.5
1.5
7.0
4.5
5.0
4.5
2.0
3.0
2.0
1.5
2.5
2.5
3.5
Transcribed Image Text:28. A guidance and detection system is being built as part of a large defense project. The detection portion consists of radar and sonar subsystems. Separate equipment is required for each of the subsystems. In each case, the equipment must be calibrated prior to production. After production, each subsystem is tested independently. The radar and the sonar are combined to form the detection system, which also must be tested prior to integration with the guidance system. The final test of the entire system requires complex equipment. The activities and the activity times are Activity Time Required (days) A: Calibrate machine 1 (for radar) B: Calibrate machine 2 (for sonar) C: Calibrate machine 3 (for guidance) D: Assemble and prepare final test gear E: Make radar subsystem F: Make sonar subsystem G: Make guidance subsystem H: Test radar subsystem I: Test sonar subsystem J: Test guidance subsystem K: Assemble detection subsystem (radar and sonar) L: Test detection subsystem M: Final assembly of three systems N: Testing of final assembly 2.0 3.5 1.5 7.0 4.5 5.0 4.5 2.0 3.0 2.0 1.5 2.5 2.5 3.5
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