Average completion time for a schedule sequence at a work centre is the ratio of
A) total processing time to the number of jobs.
B) total flow time to total processing time.
C) total flow time to the number of jobs.
D) total processing time plus total late time to the number of jobs.
E) total flow time plus total late time to the number of jobs.

Question

Quizplus · Accepted Answer

The average completion time for a schedule sequence at a work center is calculated as the total flow time divided by the number of jobs. This is because the total flow time measures the time a job spends in the system (i.e. from the moment it enters the work center until it leaves), and dividing by the number of jobs gives us an average time per job. Option A is incorrect because it only takes into account the processing time of each job, but it does not include any waiting or queueing time. Option B is incorrect because it divides the total flow time by the total processing time, which does not account for any waiting or queueing time either. Option D and E are incorrect because they add the total late time (i.e. time a job spends beyond its due date) to the numerator, which is not necessary to calculate the average completion time per job. Therefore, the best choice is C.

Average Completion Time for a Schedule Sequence at a Work