It is Monday 3rd of June and Sarah is delighted that at the end of last week her staff managed to finish all the
outstanding jobs. Sarah is in charge of a proofreading department at a publishers and she looked forward to
starting the new batch of jobs that would be in her in-tray that morning. She found five jobs, the details of
which are shown in Table 1.
Table 1: Job that require sequencing (Monday June 3rd)
Job Processing
Time
Due Date
1 6 days June 12
2 2 days June 10
3 8 days June 26
4 3 days June 21
5 9 days July3
On looking at the jobs and their due dates (due date is the date on which the jobs need to be finished), she was
not sure whether her department would be able to deliver all the jobs on time. If the department works only a
five-day week with no weekend working, calculate the total time in process, total lateness, average time in
process and average lateness if Sarah adopts;
(a) The first-in-first-out rule,
(b) The due date rule,
(c) The shortest operation time rule.