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)
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			1.56			1.47			1.51			1.49			1.52
3		110			0.84			0.89			0.77			0.83			0.83			0.80
4		100			1.10			1.14			1.08			1.15			1.16			1.26

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

Element	Average cycle
1
2
3
4

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

Element	Normal time
1
2
3
4

c. Assuming an allowance percentage of 11 percent of job time, compute the standard time for this job. (Round your answers to 3 decimal places.)

Element	Standard time
1
2
3
4