An Aircraft Company is preparing a contract proposal to submit to the defense department for a new military aircraft, the X-300J jet fighter. Part of the proposal is a development and production schedule for completion of the first aircraft. The project consists of three primary categories: engine design and development, development and production of the airframe (e.g., the aircraft body), and design and development of the aircraft avionics (e.g., the electronic systems, equipment, and other devices used to operate and control the aircraft). Following is a list of the project activities, with time estimates (in months) as shown in figure: Develop the project network and determine the critical path, the expected project duration, and the variance. What is the probability that the project will be completed within 8 years?

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An Aircraft Company is preparing a contract proposal to submit to the defense department for a new military aircraft, the X-300J jet fighter. Part of the proposal is a development and production schedule for completion of the first aircraft. The project consists of three primary categories: engine design and development, development and production of the airframe (e.g., the aircraft body), and design and development of the aircraft avionics (e.g.,
the electronic systems, equipment, and other devices used to operate and control the aircraft). Following is a list of the project activities, with time estimates (in months) as shown in figure:

Develop the project network and determine the critical path, the expected project duration, and the variance. What is the probability that the project will be completed within 8 years?

Time
Estimates (mo.)
Activity
Predecessor
Activity
Activity Description
a
m
General design
Engine design
Airframe design
Avionics design
Develop test engine
Develop test airframe
Develop interim avionics
Develop engine
5
10
22
57
2
20
33
3
6
17
33
4
8
20
5
7
10
12
18
28
7
7
15
8
19
24
41
9
Assemble test aircraft
5, 6, 7
4
10
10
Test avionics
5
10
16
Conduct engine/airframe flight trials
Conduct avionics flight trials
Produce engine
5
5
9.
12
12
10
24
13
8
11
14
15
14
Produce airframe
12
15
20
15
Produce avionics
11, 12
14
16
25
16
Final assembly/finish
13, 14, 15
3
to
- - N 3427 4
Transcribed Image Text:Time Estimates (mo.) Activity Predecessor Activity Activity Description a m General design Engine design Airframe design Avionics design Develop test engine Develop test airframe Develop interim avionics Develop engine 5 10 22 57 2 20 33 3 6 17 33 4 8 20 5 7 10 12 18 28 7 7 15 8 19 24 41 9 Assemble test aircraft 5, 6, 7 4 10 10 Test avionics 5 10 16 Conduct engine/airframe flight trials Conduct avionics flight trials Produce engine 5 5 9. 12 12 10 24 13 8 11 14 15 14 Produce airframe 12 15 20 15 Produce avionics 11, 12 14 16 25 16 Final assembly/finish 13, 14, 15 3 to - - N 3427 4
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