Sweet-Dreams Inc. manufactures custom pillows. Five jobs are waiting to be processed using the SPT priority rule. Their processing times are shown in the following table. What is the average number of jobs in the system?
Job Processing Time
A 8
B 2
C 4
D 6
E 7
a) 66
b) 13.2
c) 27
d) 5.4
e) 3.38
Answer: e) 3.38
Solution:
B 2
C 4
D 6
E 7
A 8
Total = 27/5=5.4 mean
27/8=3.38