truct a network diagram and determine ES, EF slack times of all activities. mine the expected completion time and critica k wishes to reduce the time required to compl uired
truct a network diagram and determine ES, EF slack times of all activities. mine the expected completion time and critica k wishes to reduce the time required to compl uired
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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![York Appliance Company (YAC) makes pizza ovens for commercial use. Jack Wood, the CEO, is
contemplating a new project which produces smaller ovens for use in high school and college
kitchens. The activities necessary to build an experimental model (Model: YAC-03) and related data
are given in the following table.
Immediate
Predecessors
Normal
Time
Crash
Time
Normal
Crash
Activity
Cost ($)
Cost ($)
(Weeks)
(Weeks)
A
None
4
2,050
2,325
B
None
1
2,200
2,800
C
A
3
500
500
2,700
1,850
3,500
D
8
4
2,300
E
А, В
1,550
F
3
2
3,000
G
С, Е
4
1,400
2,200
H
G
800
1,000
1,500
2,200
D, G
4
3
1,650
J
H, I
4
2,950
a) Construct a network diagram and determine ES, EF, LS and LF for each activity.
b) Find slack times of all activities.
c) Determine the expected completion time and critical path/s.
d) If Jack wishes to reduce the time required to complete this project by four weeks, please help him
fill out the following table completely.
Completion Time
before Crashing
Activity/ies to
be Crashed
Trial #
Critical Paths
Crash Cost
e) How much does it cost to crash the project by four weeks, and how much will it cost to complete
the crashed project?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F99009e06-662f-437c-941f-51a1579c4053%2F1c265cdb-cfcf-4c27-8f32-2daeb3e02a25%2Fzqni26g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:York Appliance Company (YAC) makes pizza ovens for commercial use. Jack Wood, the CEO, is
contemplating a new project which produces smaller ovens for use in high school and college
kitchens. The activities necessary to build an experimental model (Model: YAC-03) and related data
are given in the following table.
Immediate
Predecessors
Normal
Time
Crash
Time
Normal
Crash
Activity
Cost ($)
Cost ($)
(Weeks)
(Weeks)
A
None
4
2,050
2,325
B
None
1
2,200
2,800
C
A
3
500
500
2,700
1,850
3,500
D
8
4
2,300
E
А, В
1,550
F
3
2
3,000
G
С, Е
4
1,400
2,200
H
G
800
1,000
1,500
2,200
D, G
4
3
1,650
J
H, I
4
2,950
a) Construct a network diagram and determine ES, EF, LS and LF for each activity.
b) Find slack times of all activities.
c) Determine the expected completion time and critical path/s.
d) If Jack wishes to reduce the time required to complete this project by four weeks, please help him
fill out the following table completely.
Completion Time
before Crashing
Activity/ies to
be Crashed
Trial #
Critical Paths
Crash Cost
e) How much does it cost to crash the project by four weeks, and how much will it cost to complete
the crashed project?
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