CMA Intermediate · Operations Management and Strategic Management · Control Measures - Time and Motion Study, Method Study, Work Study
For a packing task at a Nashik firm, the average observed time is 3.00 minutes, the operator rating is 90 on a standard of 100, and allowances are 20% of basic time. What is the standard time per unit?
The standard time is 3.24 minutes. First normalise the observed time by rating: 3.00 × 90/100 gives 2.70 minutes. Then add a 20% allowance on basic time, which is 0.54, giving 3.24 minutes per unit.
- A3.24 minutesCorrect
- B3.38 minutes
- C3.60 minutes
- D2.70 minutes
Explanation
Basic time = 3.00 × 90/100 = 2.70 minutes. Allowance = 20% × 2.70 = 0.54. Standard time = 2.70 + 0.54 = 3.24 minutes. Option 2.70 omits the allowance, while 3.60 applies the allowance to observed time and ignores rating.
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