Problem
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)
|
| Element |
Performance
Rating |
1 |
2 |
3 |
4 |
5 |
6 |
| 1 |
90% |
0.44 |
0.50 |
0.43 |
0.45 |
0.46 |
0.46 |
| 2 |
85 |
1.50 |
1.59 |
1.47 |
1.51 |
1.49 |
1.52 |
| 3 |
110 |
0.84 |
0.89 |
0.77 |
0.83 |
0.86 |
0.80 |
| 4 |
100 |
1.10 |
1.14 |
1.08 |
1.17 |
1.16 |
1.26 |
a. Determine the average cycle time for each element. (Round your answers to 3 decimal places.)
b. Find the normal time for each element. (Round your answers to 3 decimal places.)
c. Assuming an allowance factor of 11 percent of job time, compute the standard time for this job. (Round your answers to 3 decimal places.)