A time study was conducted on a job that contains four elements. The observed ti

Question

A time study was conducted on a job that contains four elements. The observed times and performance ratings for six cycles are shown in the following table.

OBSERVATIONS (minutes per cycle)

Determine the average cycle time for each element. (Round your answers to 3 decimal places.)

Find the normal time for each element. (Round your intermediate calculations and final answers to 3 decimal places.)

Assuming an allowance factor of 15 percent of job time, compute the standard time for this job. (Round your intermediate calculations and final answers to 3 decimal places.)

OBSERVATIONS (minutes per cycle)

Element Performance
Rating 1 2 3 4 5 6 1 90% 0.44 0.50 0.43 0.45 0.48 0.46 2 85 1.50 1.54 1.47 1.51 1.49 1.52 3 110 0.84 0.89 0.77 0.83 0.85 0.80 4 100 1.10 1.14 1.08 1.20 1.16 1.26

Explanation / Answer

1. The average cycle time for each element is given below:

The formula that is used to calculate Average cycle time is given below:

Avg cycle time = Sum of the time needed to perform each task/ No. of Job cycles

2. The normal time for each element is given below:

The formula that is used to calculate normal time is given below:

Normal time = (Avg Element time) * (Performance rating/100)

3. The standard time for the job assuming the allowance time as 11% is given below:

The formula that is used to calculate the ST is given below:

ST= Normal Time/ (1- allowance factor)

Element Average Cycle time 1 0.448 2 1.508 3 0.833 4 1.152

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