Table J.5
The following three jobs just arrived (end of hour 0) at Workstation A. They are the only ones waiting to be processed.

-Use the information in Table J.5. The average past due using the slack per remaining operations (S/RO) rule is:
A) fewer than or equal to 9.0.
B) greater than 9.0 but fewer than or equal to 18.0.
C) greater than 18.0 but fewer than or equal to 27.0.
D) greater than 27.0.

Question

Table J.5
The following three jobs just arrived (end of hour 0) at Workstation A. They are the only ones waiting to be processed.
 
-Use the information in Table J.5. The average past due using the slack per remaining operations (S/RO) rule is:
A) fewer than or equal to 9.0. 
B) greater than 9.0 but fewer than or equal to 18.0. 
C) greater than 18.0 but fewer than or equal to 27.0. 
D) greater than 27.0.

Quizplus · Accepted Answer

Using the S/RO rule, we calculate the slack time per remaining operation for each job.

For job TB1252_00, the slack per remaining operation is (42-25)/(5-1) = 4.25
For job TB1252_00, the slack per remaining operation is (34-21)/(4-1) = 4.33
For job TB1252_00, the slack per remaining operation is (92-23)/(6-1) = 13.8

The average of these values is (4.25 + 4.33 + 13.8)/3 = 7.46

Therefore, the average past due using the S/RO rule is greater than 9.0 but fewer than or equal to 18.0, making choice B the correct answer.

Table J.5 The Following Three Jobs Just Arrived (End of Hour 0)