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Six jobs are to be processed through machines A and B in the order AB. The processing time of jobs on different machines are given below:
The optimal sequence of jobs, is
  • a)
    1 - 2 - 3 - 4 - 5 - 6
  • b)
    2 - 3 - 6 - 5 - 4 - 1
  • c)
    3 - 1 - 5 - 6 - 2 - 4
  • d)
    3 - 2 - 1 - 4 - 5 - 6
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Six jobs are to be processed through machines A and B in the order AB...
By Examination the rows, we find the smallest value. It is 6 min for job 4 on machine B. Thus, we schedule job 4 last as shown below.
After excluding this set of processing time, the next smaller processing time is 7. There are two minimal values, Processing time 7 for job 3 on machine A and processing time 7 for job 2 on machine B. According to the rules, job 3 is scheduled on the right and job 2 next to job 4 as shown below.
After excluding there set, gain two minimal values. Processing time 8 for job 1 on machine A and processing time 8 for job 6 on machine B. Thus, job 1 scheduled next to job 3 and job 6 next to job 2 as shown below.
Thus, complete sequence is obtained to let job 5 in the remaining block.
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Six jobs are to be processed through machines A and B in the order AB. The processing time of jobs on different machines are given below:The optimal sequence of jobs, isa)1 - 2 - 3 - 4 - 5 - 6b)2 - 3 - 6 - 5 - 4 - 1c)3 - 1 - 5 - 6 - 2 - 4d)3 - 2 - 1 - 4 - 5 - 6Correct answer is option 'C'. Can you explain this answer?
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