8. Operations times of servicing of Washing Machines are given below. The first operation involves cleaning in Machine 1 and the second operation involves oiling in Machine 2. a. Determine a sequence that will minimize the total completion time for this group of jobs, following Johnson's Rule. b. Construct a chart of the operations of the jobs at the two work centers and determine idle time of each line, assuming no other activities are involved. Processing times (Hrs.) is as follows: JOBS : A E F Machine 1 : 5 4 8 6. 12 Machine 2 : 5 3 9. 8. 15

Practical Management Science
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Author:WINSTON, Wayne L.
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8. Operations times of servicing of Washing Machines are given below. The first operation
involves cleaning in Machine 1 and the second operation involves oiling in Machine 2.
a. Determine a sequence that will minimize the total completion time for this
group of jobs, following Johnson's Rule.
b. Construct a chart of the operations of the jobs at the two work centers and
determine idle time of each line, assuming no other activities are involved.
Processing times (Hrs.) is as follows:
JOBS
: A
E
F
Machine 1
: 5
4
8.
6.
12
Machine 2
:5 3
9.
8.
15
Transcribed Image Text:8. Operations times of servicing of Washing Machines are given below. The first operation involves cleaning in Machine 1 and the second operation involves oiling in Machine 2. a. Determine a sequence that will minimize the total completion time for this group of jobs, following Johnson's Rule. b. Construct a chart of the operations of the jobs at the two work centers and determine idle time of each line, assuming no other activities are involved. Processing times (Hrs.) is as follows: JOBS : A E F Machine 1 : 5 4 8. 6. 12 Machine 2 :5 3 9. 8. 15
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