Skip to content

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

In a time study, a worker's observed performance is judged to be 120% against the standard (normal) rating of 100. The mean observed time for an element is 2.50 minutes. What is the basic (normal) time for the element?

The basic time is 3.00 minutes. Basic time equals observed time multiplied by the rating factor, so 2.50 x 1.20 = 3.00 minutes. Because the worker performed faster than normal, the observed time is adjusted upward to show what a normal worker would take.

  1. A2.08 minutes
  2. B3.00 minutesCorrect
  3. C2.50 minutes
  4. D3.50 minutes

Explanation

Basic time = observed time x rating/100 = 2.50 x 120/100 = 3.00 minutes. Cross-check: 3.00 / 1.2 = 2.50. The value 2.08 results from dividing by the rating instead of multiplying, which is wrong because a faster-than-normal worker needs the observed time scaled up to normal pace.

Did you get it right without looking?

One question tells you little. A timed set on Control Measures - Time and Motion Study, Method Study, Work Study shows your real accuracy, how long you take and where you lose marks.

Practise Control Measures - Time and Motion Study, Method Study, Work StudyFree diagnostic mock

More Control Measures - Time and Motion Study, Method Study, Work Study questions