Question: An industrial engineer is performing a time study and knows that 70 minutes are normally devoted to rest periods and lunch, but an allowance for
An industrial engineer is performing a time study and knows that 70 minutes are normally devoted to rest periods and lunch, but an allowance for unavoidable delay must be estimated. A ratio-delay work-sampling study was conducted, with the following results:
| Activity | Number of Observations |
| Unavoidable delay | 38 |
| Avoidable delay | 66 |
| Other | 446 |
| Total | 550 |
Question: please determine the allowance factor based on the above information. Please provide formula to determine the allowance factor.
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