Question

# A soldering operation was work-sampled over two days (16 hours) during which an employee soldered 108 joints, actual working time was 90% of the total time and the performance rating was estimated to be 120 percent. If the contract provides allowance of 20 percent of the total time available, the standard time for the operation would be

A
8.9 min
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B
10 min
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C
12 min
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D
8 min.
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Solution

## The correct option is C 12 minTotal time = 16 hours Actual time per joint =90100×16108×60=8 min Normal time = Actual time × Rating factor Normal time = Actual time ×120100 = 8 × 1.2 = 9.6 min Standard time = Normal time + Allowances S.T. = N.T. + 0.2 S.T. ⇒ S.T.=9.60.8=12 min

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