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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
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- 8 min.
- 8.9 min
- 10 min
- 12 min
Correct Option: D
Total time = 16 hours
T = 16 × 60 = 960 min
| Actual time = | × 960 = 864 minute | |
| 100 |
Normal time T normal = 120% of 864
| ⇒ | × 864 = 1036.8 min | |
| 100 |
Total Standard time: Tstandard
| Tstandard = | |||||
| 1 − | |||||
| 100 | |||||
| = | = | = 1296 min | ||
| 1 − 0.2 | 0.8 |
No. of Joints soldered(N)
N = 108.
Standard time for operation
| ⇒ | = 12min | |
| 108 |
