Table J.11
Work center Q45 has four jobs that just arrived (the start of Day 1) to be processed, as shown in the following table. Assume the shop works eight hours per day.

-Using the information in Table J.11 and the slack per remaining operations ratio (S/RO) rule, what is the average past due?
A) fewer than or equal to 10 hours
B) greater than 10 hours but fewer than or equal to 20 hours
C) greater than 20 hours but fewer than or equal to 30 hours
D) greater than 30 hours

Question

Table J.11
Work center Q45 has four jobs that just arrived (the start of Day 1) to be processed, as shown in the following table. Assume the shop works eight hours per day.
 
-Using the information in Table J.11 and the slack per remaining operations ratio (S/RO) rule, what is the average past due?
A) fewer than or equal to 10 hours 
B) greater than 10 hours but fewer than or equal to 20 hours 
C) greater than 20 hours but fewer than or equal to 30 hours 
D) greater than 30 hours

Quizplus · Accepted Answer

Using the S/RO rule, we need to calculate the S/RO ratio for each job and then sort them in increasing order.

Job 2 has no remaining operations, so it is not included in the calculation. For the remaining jobs, we have:

Job 1: (5 - 2) / 32 = 0.094
Job 3: (6 - 4) / 24 = 0.083
Job 4: (4 - 2) / 24 = 0.083

Sorting in increasing order gives us: Job 3, Job 4, Job 1

The average past due is calculated as follows:
[(3 - 0) + (4 - 2) + (6 - 4)] / 3 = 3

Therefore, the average past due is greater than 20 hours but fewer than or equal to 30 hours, so the answer is C.

Table J.11 Work Center Q45 Has Four Jobs That Just Arrived (The