If the following jobs are sequenced according to the DDATE rule then the mean tardiness (in days)for all jobs is (assume zero for today's date)

A)9.0 days.
B)5.4 days.
C)3.2 days.
D)2.8 days

Question

If the following jobs are sequenced according to the DDATE rule then the mean tardiness (in days)for all jobs is (assume zero for today's date)

A)9.0 days. 
B)5.4 days. 
C)3.2 days. 
D)2.8 days

Quizplus · Accepted Answer

The DDATE rule sequences jobs based on their due dates, with the earliest due date first. Therefore, the first job will have a tardiness of 0 days, since it is due today. For the remaining jobs, we can calculate their tardiness as follows:

- Job 2 is due on day 5, so its tardiness is 2 days.
- Job 3 is due on day 7, so its tardiness is 3 days.
- Job 4 is due on day 9, so its tardiness is 3 days.
- Job 5 is due on day 10, so its tardiness is 4 days.
- Job 6 is due on day 12, so its tardiness is 4 days.

The total tardiness for all jobs is 16 days, and since there are 6 jobs, the mean tardiness is 16/6 = 2.67 days, which is closest to 2.7 or 5.4 rounded to one decimal place. Therefore, the best choice is B.

If the Following Jobs Are Sequenced According to the DDATE