Author Question: Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two ... (Read 70 times)

soccerdreamer_17 · **on:** Dec 3, 2019

Question 1

At Morgan's Transformer Rebuilding, five jobs are ready now for dispatching to a machine centre. The processing times and due dates for the jobs are given below. Use earliest due date to sequence the jobs, and calculate the average completion time, the average job lateness, and the average number of jobs in the machine centre.

Job	Work Time (days)	Due Date (days)
A	15	38
B	13	28
C	7	20
D	18	50
E	9	15

Question 2

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

mk6555 · **Reply #1 on:** Dec 3, 2019

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