Time Study

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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)

ElementPerformance
Rating		123456
190%       0.44  0.50  0.43  0.45  0.48  0.46  
285          1.50  1.52  1.47  1.51  1.49  1.52  
3110          0.84  0.89  0.77  0.83  0.82  0.80  
4100          1.10  1.14  1.08  1.14  1.16  1.26  

 
a.

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


 
 Element        Average cycle  
  1[removed]   
  2[removed]   
  3[removed]   
  4[removed]   
 
 
b.

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


 
 Element           Normal time  
  1[removed]   
  2[removed]   
  3[removed]   
  4[removed]   

 
c.

Assuming an allowance factor of 18 percent of job time, compute the standard time for this job. (Round your answers to 3 decimal places.)


 
 Element           Standard time  
  1[removed]   
  2[removed]   
  3[removed]   
  4[removed]   
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