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CMA Intermediate · Operations Management and Strategic Management · Control Measures - Time and Motion Study, Method Study, Work Study

A task has a basic time of 8 minutes. Allowances are expressed as 20% of the standard time (i.e., of the total time including allowances), not of basic time. What is the standard time?

The standard time is 10 minutes. When allowance is a percentage of standard time, basic time forms the remaining 80%, so standard time is 8 divided by 0.80, which equals 10. The allowance of 2 minutes is 20% of 10.

  1. A9.60 minutes
  2. B10.00 minutesCorrect
  3. C8.80 minutes
  4. D6.40 minutes

Explanation

If allowance is 20% of standard time, basic time is 80% of standard time. Standard time = 8/0.80 = 10.00 minutes. Check: 20% of 10 = 2, and 8 + 2 = 10. Option 9.60 wrongly applies 20% to basic time.

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