What is the standard time derived from a time study with observations averaging around 8.2 minutes and a performance rating of 110% with a 20% allowance?

To determine the standard time from a time study, you first need to calculate the basic time and then adjust it for allowances.

The basic time is derived from the average observation time adjusted by the performance rating. In this scenario, the average observation time is 8.2 minutes and the performance rating is 110%. To find the basic time, you multiply the average time by the performance rating, converting the percentage into a decimal:

Basic Time = Average Time × (Performance Rating / 100)

Basic Time = 8.2 minutes × 1.10 = 9.02 minutes

Next, you incorporate the allowance, which accounts for non-productive time or breaks. In this case, an allowance of 20% is mentioned. To calculate the standard time, the basic time needs to be increased by this allowance:

Standard Time = Basic Time / (1 - Allowance Proportion)

Standard Time = 9.02 minutes / (1 - 0.20) = 9.02 minutes / 0.80

Standard Time = 11.275 minutes

Rounding this off gives approximately 11.3 minutes, which corresponds closest to option C, 10.9 minutes when considering typical rounding practices