Equipment job productivity is calculated by
- AWork done units + efforts in equipment hours
- BWork done units – efforts in equipment hours
- CWork done units × efforts in equipment hours
- DWork done units / efforts in equipment hoursCorrect
Solution
Concept
Calculation of equipment job productivity
Formula
Equipment job productivity = Work done units / efforts in equipment hours
Step-by-step solution
1. Equipment productivity measures the rate at which work is accomplished per unit time or effort. 2. It is defined as the total output of work divided by the total equipment operating effort expended. 3. Therefore, Equipment Job Productivity = Work done units / efforts in equipment hours. Answer: D
Explanation
Equipment job productivity measures the output efficiency of a machine relative to its operating duration. It is calculated by dividing the total volume of work completed by the total equipment operating hours invested. This ratio directly provides the production rate of the machine per hour.
Why the other options are wrong
A) Adding work units and equipment hours is invalid due to incompatible units. B) Subtracting time from output units produces a meaningless quantity. C) Multiplying output by equipment hours does not yield a productivity rate per hour.
Shortcut
Productivity = Output ÷ Input (Work done units / Equipment hours).
Common mistake
Multiplying work done units by equipment hours instead of dividing total output by required equipment hours.
Correct answer: D) Work done units / efforts in equipment hours