Table 10.7
The framing department has six jobs waiting to be processed. It is now time zero and all jobs are ready to begin. Each has only one operation remaining. All jobs arrived at the same time, and FCFS begins with job A, then B, etc.

-Using the information in Table 10.7 and the first-come, first-served (FCFS) rule, what is the average days past due?
A) fewer than or equal to 6 days
B) greater than 6 days but fewer than or equal to 10 days
C) greater than 10 days but fewer than or equal to 14 days
D) greater than 14 days

Question

Table 10.7
The framing department has six jobs waiting to be processed. It is now time zero and all jobs are ready to begin. Each has only one operation remaining. All jobs arrived at the same time, and FCFS begins with job A, then B, etc.
 
-Using the information in Table 10.7 and the first-come, first-served (FCFS) rule, what is the average days past due?
A) fewer than or equal to 6 days 
B) greater than 6 days but fewer than or equal to 10 days 
C) greater than 10 days but fewer than or equal to 14 days 
D) greater than 14 days

Quizplus · Accepted Answer

Using FCFS, the order in which the jobs are completed is as follows:

Job A: 1 day late
Job B: 0 days late
Job C: 3 days late
Job D: 5 days late
Job E: 8 days late
Job F: 11 days late

The average days past due is (1 + 0 + 3 + 5 + 8 + 11)/6 = 4.6 days.
Therefore, the answer is C, which states that the average days past due is greater than 10 days but fewer than or equal to 14 days.

Table 10.7 The Framing Department Has Six Jobs Waiting to Be Processed