Problem 7-3 A time study was conducted on a job that contains four elements. The
ID: 352621 • Letter: P
Question
Problem 7-3 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) Performance Rating 98% Element 0.50 0.43 0.45 0.48 0.44 1.50 1.54 1.47 1.51 1.49 1.52 0.84 0.89 0.77 0.83 0.85 .80 1.10 1.14 1.08 1.20 1.16 1.26 0.46 85 110 100 4 a. Determine the average cycle time for each element. (Round your answers to 3 decimal places.) Element Average cycle 4 b. Find the normal time for each element. (Round your intermediate calculations and final answers to 3 decimal places.) Element Normal time c. 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.) Element Standard time 4Explanation / Answer
Please find below calculation for average cycle time / Normal time / Standard time as asked for :
O B S E R V A T I O N S (MINUTES PER CYCLE)
Element
Performance rating (%)
1
2
3
4
5
6
Average cycle time
Normal time
Standard time
1
90
0.44
0.5
0.43
0.45
0.48
0.46
0.460
0.414
0.476
2
85
1.5
1.54
1.47
1.51
1.49
1.52
1.505
1.279
1.471
3
110
0.84
0.89
0.77
0.83
0.85
0.8
0.830
0.913
1.050
4
100
1.1
1.14
1.08
1.2
1.16
1.26
1.157
1.157
1.330
Following to be noted :
Average cycle time for any element = Sum of 6 observations / 6
Normal time for any element = Average cycle time x Performance rating (%)/100
Standard time for any element = Normal time for the element x 1.15 ( because of 15% allowance factor )
Answer to question a :
Element
Average cycle time ( minutes)
1
0.460
2
1.505
3
0.830
4
1.157
Answer to question b :
Element
Average cycle time ( minutes)
1
0.414
2
1.279
3
0.913
4
1.157
Answer to question c :
Element
Average cycle time ( minutes)
1
0.476
2
1.471
3
1.050
4
1.330
O B S E R V A T I O N S (MINUTES PER CYCLE)
Element
Performance rating (%)
1
2
3
4
5
6
Average cycle time
Normal time
Standard time
1
90
0.44
0.5
0.43
0.45
0.48
0.46
0.460
0.414
0.476
2
85
1.5
1.54
1.47
1.51
1.49
1.52
1.505
1.279
1.471
3
110
0.84
0.89
0.77
0.83
0.85
0.8
0.830
0.913
1.050
4
100
1.1
1.14
1.08
1.2
1.16
1.26
1.157
1.157
1.330