Question 1

How many cycles should be used in a time study in order to be 98% confident that the time-study average job cycle time is within 4% of the true average job cycle time? Assume that the average job cycle time was 4.25 minutes and the standard deviation of the sample was 0.65 minutes.

Accepted Answer

A) 55 cycles 
B) 70 cycles 
C) 80 cycles 
D) 95 cycles

Question 2

Workers often do not like to be the subject of a time study and are sometimes unwilling to cooperate.

Accepted Answer

A) True 
 B)False

Question 3

Rating worker performance is typically an objective,easy task that can be done by any employee.

Accepted Answer

A) True 
 B)False

Question 4

What is work sampling and what is its primary use?

Accepted Answer

The answer of What is work sampling and what is...

Question 5

For a particular time study,a company would like to be 95% confident that the average job cycle time is within 2% of the true average job cycle time.Assume that the average job cycle time was 6.53 minutes and the standard deviation of the sample was 1.26 minutes.The number of cycles that should be used in this time study would be

Accepted Answer

A) 174. 
B) 358. 
C) 463. 
D) 864.

Question 6

Work sampling is a technique for determining the proportion of time a worker or machine is idle.

Accepted Answer

A) True 
 B)False

Question 7

Briefly discuss the advantages and disadvantages of a predetermined motion time system.

Accepted Answer

The answer of Briefly discuss the advantages and disadvantages of...

Question 8

Determining the length of time it takes to do a job is known as work measurement.

Accepted Answer

A) True 
 B)False

Question 9

As part of a time study,a particular job was analyzed.The study included 20 job cycles and the following cumulative times and performance rating factors for each element were reported:  Assuming an allowance factor of 15%,the standard time for this job would be

Accepted Answer

A) 4.35 minutes. 
B) 3.67 minutes. 
C) 2.712 minutes. 
D) 2.358 minutes.

Question 10

Under normal circumstances and conditions,the time required by an "average" worker to perform a job once is referred to as the cycle time.

Accepted Answer

A) True 
 B)False

Question 11

In a time study,the normal time is computed as

Accepted Answer

A) the elemental average time multiplied by the rating factor. 
B) the elemental average time divided by the rating factor. 
C) the elemental average time minus the rating factor. 
D) the elemental average time plus the rating factor.

Exam 11: Operational Decision-Making Tools: Work Measurement

How many cycles should be used in a time study in order to be 98% confident that the time-study average job cycle time is within 4% of the true average job cycle time? Assume that the average job cycle time was 4.25 minutes and the standard deviation of the sample was 0.65 minutes.

Workers often do not like to be the subject of a time study and are sometimes unwilling to cooperate.

Rating worker performance is typically an objective,easy task that can be done by any employee.

What is work sampling and what is its primary use?

Work sampling is a technique for determining the proportion of time a worker or machine is idle.

Briefly discuss the advantages and disadvantages of a predetermined motion time system.

Determining the length of time it takes to do a job is known as work measurement.

As part of a time study,a particular job was analyzed.The study included 20 job cycles and the following cumulative times and performance rating factors for each element were reported: Assuming an allowance factor of 15%,the standard time for this job would be

Under normal circumstances and conditions,the time required by an "average" worker to perform a job once is referred to as the cycle time.

In a time study,the normal time is computed as