You want to determine the control lines for a -chart for quality control purposes. If the
total number of defects from all samples is 560, the number of samples is 70, and the
sample size is 80, which of the following would be the standard deviation used in
developing the control lines?
A. 0.9000
B. 0.4556
C. 0.0335
D. 0.0011
E. 0.0112
A work center has five jobs assigned to it. They are labeled, in the order of their arrival
in the shop, as jobs A, B, C, D, and E. The work center may work on only one job at a
time and must complete any job it starts before starting another job. Job A has a
processing time of 6 days and is due to the customer in 9 days. Job B has a processing
time of 2 days and is due in 16 days. Job C has a processing time of 4 days and is due in
10 days. Job D has a processing time of 3 days and is due in 7 days. Job E has a
processing time of 5 days and is due in 12 days. Using the shortest operating time
priority rule, in what order should these jobs be undertaken?
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