Hart Manufacturing Operates an Automated Steel Fabrication Process

Hart Manufacturing operates an automated steel fabrication process. For one operation, Hart has found that 45% of the total throughput (manufacturing cycle) time is spent on non-value-added activities. Delivery cycle time is 12 hours, waiting time during the production process is 3 hours, queue time prior to starting the production process is 2 hours, and inspection time is 1.2 hours.
-The manufacturing cycle efficiency (MCE) for this operation is:

A) 55%
B) 45%
C) 6.6 hours
D) 5.4 hours