OPIM 330 Operations Management Homework- Effat University
Question I:
• Explain with examples of the product and service design considerations/factors.
Question II:
• In details Explain the dimensions of product quality.
Question III:
A female tailor buys fabric in 100-meter rolls. She uses 125 rolls per year to fabricate coloured Abayyas. The ordering cost is 20 SR per order and the annual carrying cost is 2 SR per roll.
• What is the Economic Order Quantity (EOQ) for this business?
• How many orders the tailor needs to make every year to run her business?
• What is the length of each order cycle in days if she works 200 days only?
• Compute the total cost of ordering and carrying the fabric rolls.
Question IV:
A small software development project has nine major activities. The times are estimated and provided in the table below.
|
Activity
|
Immediate Predecessor
|
Optimistic
|
Most Likely
|
Pessimistic
|
|
A
|
-
|
4
|
6
|
8
|
|
B
|
-
|
4
|
10
|
16
|
|
C
|
A
|
2
|
4
|
18
|
|
D
|
A
|
10
|
10
|
10
|
|
E
|
B, C
|
12
|
14
|
16
|
|
F
|
B
|
28
|
28
|
28
|
|
G
|
D, E
|
2
|
10
|
18
|
|
H
|
G, F
|
2
|
8
|
16
|
• What is the project completion time?
• What is the critical activities?
• What is the probability that the project will be completed in 54 weeks?
• What is the probability that the project will be completed in 45 weeks?
Question V:
Based on the table below. Answer the following question
|
Act
|
Pred.
|
Normal Time (weeks)
|
Crash Time (weeks)
|
Normal Cost $
|
Crash Cost $
|
|
A
|
-
|
3
|
3
|
300
|
300
|
|
B
|
-
|
2
|
2
|
200
|
200
|
|
C
|
A,B
|
4
|
2
|
200
|
400
|
|
D
|
C
|
3
|
1
|
100
|
400
|
|
E
|
B
|
2
|
1
|
150
|
300
|
|
F
|
D,E
|
2
|
1
|
50
|
100
|
• What is the project completion date?
• Find the SLACK & crash cost per day for each activity.
• If you wish to reduce the time required to complete this project by 3 weeks, which activity should be crashed? And find the new total cost of completing the project (after crashing).
Question VI:
Develop a solution for the following project problem.
|
Act.
|
Pred.
|
Normal Time (expected time) (Days)
|
Normal Cost
|
Crash Time (Days)
|
Crash Cost (total)
|
Variance σ^2
|
|
A
|
-
|
35
|
$2500
|
20
|
$4000
|
7
|
|
B
|
A
|
15
|
$1000
|
10
|
$1750
|
3
|
|
C
|
A
|
30
|
$2500
|
20
|
$4500
|
4
|
|
D
|
C
|
15
|
$1000
|
5
|
$2500
|
6
|
|
E
|
B
|
10
|
$1500
|
5
|
$2750
|
2
|
• Draw the project network with normal time. (2 Points)
• What is the project completion time? (2 Point)
• What is the probability that the project will be completed in 90 days? (2 Points).
• The customer wants to complete the project in 65 days, what should we do (which activity should be crashed)? What will be the new total cost of completing the project (after crashing).
Question VII:
Given the information in the following table:
|
Activity
|
Immediate Predecessors
|
Estimated Time (days)
|
|
A
|
None
|
12
|
|
B
|
None
|
9
|
|
C
|
A
|
10
|
|
D
|
B
|
10
|
|
E
|
B
|
24
|
|
F
|
A
|
10
|
|
G
|
C, F
|
35
|
|
H
|
D
|
40
|
|
I
|
A
|
15
|
|
J
|
E, G, H
|
4
|
|
K
|
F, I, J
|
9
|
|
L
|
E, J
|
5
|
• Develop an AON network for this problem.
• What is the critical path?
• What is project completion time?
• Calculate the ES, EF, LS, LF, and Slack for each activity.
• Assume that completion of A is delayed by two days. What other activities are impacted? And What happens to the project?
• Assume that completion of A is delayed by two days. What other activities are impacted? And What happens to the project?
• Assume that completion of C is delayed by five days. What other activities are impacted? And What happens to the project?
• Assume that completion of E is delayed by ten days. What other activities are impacted? And What happens to the project?
Format your homework according to the give formatting requirements:
• The answer must be using Times New Roman font (size 12), double spaced, typed, with one-inch margins on all sides.
• The response also includes a cover page containing the student's name, the title of the homework, the course title, and the date. The cover page is not included in the required page length.
• Also include a reference page. The references and Citations should follow APA format. The reference page is not included in the required page length.