Sequence the jobs shown below by using a Gantt chart. Assume that move time between machine 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?

Job       work center machine      DUE DATE

1             A/3, B/2, C/2                   3

2              C/2, A/4                          2

3             B/6, A/1, C/3                   4

4             C/4, A/1 B/2                     3