Sequence the jobs shown below by using a Gantt chart. Assume that the move time between machines is one hour. Sequence the jobs in priority order 1, 2, 3, 4.

a. What is the makespan?
b. How much machine idle time is there?
c. When is each job delivered compared with its due date?
d. How much idle time (waiting time) is there for each job?
e. Devise a better job sequence for processing.

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Job Work Center/Machine Hours Due Date (days) A/3, B/2, C/2 C/2, A/4 86, A/1, C/3 CJ4, An, B12