1.
value:
2.00 points
 
 
Develop an assignment plan that will minimize processing costs, given the information shown, and interpret your answer. 
(Leave no cells blank - be certain to enter "0" wherever required. Omit the "$" sign in your response.)
 
 
WORKER
 
 
A
B
C
 
1
12
8   
11   
  Job
2
13
10   
8   
 
3
14
9   
14   
 
4
10
7   
12   
 
Optimal Table
 
A
B
C
D
1
.
b.
The combinations 1-A and 2-D are undesirable.
  The sequence is 
.
 
3.
value:
3.00 points
 
 
The following table contains information concerning four jobs that are awaiting processing at a work center.
Job
Job Time (Days)
Due Date
(Days)
A
14       
20
B
10       
16
C
7       
15
D
6       
17
a.
Sequence the jobs using (1) First come, first served, (2) Shortest processing time, (3) Earliest due date, and (4) Critical ratio. Assume the list is by order of arrival.
 
 
  Sequence for First come, first served
  Sequence for Shortest processing time
  Sequence for Earliest due date
  Sequence for Critical ratio
b.
For each of the methods in part 
a
, determine (1) the average job flow time, (2) the average tardiness, and (3) the average number of jobs at the work center. 
(Round your intermediate calculations and final answers to 2 decimal places.)
 
First Come, First Served
Shortest Processing Time
Earliest Due Date
Critical Ratio
  Average job flow time
  
  Sequence for Slack per operation
  
b.
Compute the effectiveness of each rule using each of these measures: (1) average completion time, (2) average number of jobs at the work center. 
(Round your answers to 2 decimal places.)
 
First Come, First Served
Slack per Operation
  Average completion time
.
b.
Determine idle time of center 2, assuming no other activities are involved.
  Idle time
6.
value:
3.00 points
 
 
A shoe repair operation uses a two-step sequence that all jobs in a certain category follow. For the group of jobs listed,
   
 
JOB TIMES (minutes)
 
A
B
C
D
E
  Workstation A
27
18
70
26
15
  Workstation B
45
33
30
24
10
   
a.
Find the sequence that will minimize total completion time.
 
  The sequence is
.
   
b.
Determine the amount of idle time for workstation B.
 
  Idle time
.
b.
What will be the average job tardiness? 
(Round your answer to 2 decimal places.)
  Average job tardiness
 new average job tardiness is 
[removed]
 minutes.
 
[removed] minutes   
No