- Eng. Alghamdi has four designers, he wants to assign each designer to a project. Designers 2 and 3 do not have the skills required to work on project C. The cost information is shown below in SAR.
- Determine the set of assignments that minimizes total cost
- What is the total cost of your assignments
|
Designers
|
Project A
|
Project B
|
Project C
|
Project D
|
|
1
|
1800
|
1200
|
200
|
1900
|
|
2
|
1700
|
1800
|
|
1000
|
|
3
|
2500
|
2800
|
|
1400
|
|
4
|
2800
|
1800
|
2400
|
2500
|
- Eng. Saleh currently has five 3D printers to be scheduled for repair, shown in the order in which they arrived.
|
Job
|
Processing Time (hours)
|
Due (hours)
|
|
P1
|
30
|
60
|
|
P2
|
20
|
45
|
|
P3
|
60
|
100
|
|
P4
|
25
|
45
|
|
P5
|
65
|
85
|
(a) Compare the following sequencing rules: FCFS, SPT, EDD, CR. (Show your supporting calculations below).
(b) Which dispatching rule has the best score for flow time?
(c) Which dispatching rule has the best score for work-in-process (jobs in the system)?
(d) Which dispatching rule has the best score for lateness?