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

A time study analyst in a Coimbatore textile mill finds a basic time of 4.50 minutes per piece. Allowances for fatigue, personal needs and delays total 10% of basic time. What is the standard time per piece?

The standard time is 4.95 minutes per piece. Allowances of 10% on a basic time of 4.50 minutes add 0.45 minutes, and standard time is basic time plus allowances, so 4.50 + 0.45 equals 4.95 minutes.

  1. A4.05 minutes
  2. B4.95 minutesCorrect
  3. C5.00 minutes
  4. D4.55 minutes

Explanation

Standard time = basic time + allowances = 4.50 + 10% of 4.50 = 4.50 + 0.45 = 4.95 minutes. Subtracting the allowance gives 4.05, which is the wrong sign. Dividing by 0.90 gives 5.00, which wrongly treats the allowance as a percentage of standard time.

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