Average completion $($flow$)$ time for a schedule sequence at a work center is

the sum of processing time divided by the number of jobs.

the sum of jobs' flow times divided by the number of jobs.

overall flow time divided by total processing time.

total processing time plus total late time divided by number of jobs.

the sum of flow time plus total late time divided by number of jobs.

Job $x,$ which has a duration of four days, is due by the close of business on Friday, December $23.$ Without looking at the work already scheduled on $x\text{'}$s required resource, the scheduler schedules $x$ to be begun on the morning of Tuesday, December $20.$ This is an example of

infinite scheduling.

finite scheduling.

forward scheduling.

backward scheduling.

prioritization.