Given the following information. Which of the statements below can you support with this information? Maximum capacity (labor hours): 480 hours per week
Effective capacity ratio: 85 %
Actual time worked: 380 hours per week over the last two weeks
On-time delivery %: 75 percent of the jobs are being completed on time

a. More capacity needs to be added in the short term to improve performance in the system.
b. We need to look at variability in the rate at which jobs enter the shop.
c. Our workforce is not working hard enough.
d. Our workforce may be waiting on delayed arrivals of inputs needed to do the work.
Describe the reasons why you selected the specific option(s) that you did.