Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2 ). The processing times are given in the table below
a. What is the optimal sequence?
b. What is the total flow time for this sequence?
Job Machine 1 Machine 2
L 10 11
M 8 17
N 14 9
O 13 7
P 10 8
(a, b) The optimal sequence is M-L-N-P-O, and the total flow time is 62. Details are contained in the solution table below.
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