A lift is used productively for 5.5 hours during an 8-hour shift. What is the utilization?
Correct Answer
D) 68.8%
Utilization is 5.5 / 8 = 0.6875 = 68.8%.
Why This Is the Correct Answer
Utilization is 5.5 / 8 = 0.6875 = 68.8%.
Why the Other Options Are Wrong
Option A: 31.3%
equipment utilization, choice a: 31.3% omits a required add-on/subtraction; the numeric gap is 37.5.
Option B: 55%
equipment utilization, choice b: 55% backs into 80 when divided by 0.6875; the accepted setup gives 100.07 on that same base.
Option C: 80%
equipment utilization, choice d: 80% backs into 128 when divided by 5 / 8; the accepted setup gives 110.08 on that same base.
Memory Technique
Store equipment utilization with its last math move; nearby answers are usually unfinished versions of 68.8%.
Reference Hint
Open Construction Jobsite Management, 5th Ed. (2024); use by topic index - labor hours / productivity / earned value / job cost to confirm that Utilization is 5.5 / 8 = 0.6875 = 68.8%.
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