## Final Chapter 10 Supplement

Which of the following is not a use of labor standards?

All of the above are uses of labor standards. (labor content, cost and time estimates, crew size and work balance, wage-incentive plans)

Labor standards can help a firm determine expected production, which in turn enables

managers and workers to know what constitutes a fair day’s work.

Which of the following techniques may not provide reliable and accurate time standards?

historical experience

Timing a sample of a worker’s performance and using it to set a standard is the work measurement

technique of

technique of

time studies

For a time study, the three factors that determine how large a sample size to take are

needed accuracy, desired confidence, and absolute amount of error

A manager who is conducting a time study now needs an accuracy of ±0.1 minutes, rather than

±0.2 minutes as in the past. Because of this change in accuracy, the adequate sample size becomes

±0.2 minutes as in the past. Because of this change in accuracy, the adequate sample size becomes

none of the above (1/4 as large, 1/2 as large, twice as large, four times as large)

In time studies, average observed time for an element is

for all observations, the sum of all times recorded divided by the number of observations

A time study is being conducted to determine the standard time for a job that is made up of several

elements. This standard time requires as input(s)

elements. This standard time requires as input(s)

the average observed time for each element

In time studies, normal time is

average observed time multiplied by a performance rating factor

Standard time

accounts for performance rating factors and for allowances

The smaller the percentage established for allowances

the closer is normal time to standard time

In a stopwatch time study, the average time it takes a given worker to perform a task a certain

number of times, without correction for performance rating or allowances, is the

number of times, without correction for performance rating or allowances, is the

average observed time

Which of the following are true regarding allowances in time studies?

All of the above are true. (have a constant and variable component, adjusted for work conditions, include allowances for personal time, represent adjustment between normal and standard time)

In work measurement, personal time allowances are often established in the range of

4 – 7%

The actual average observed time for a given job is 10 minutes. The performance rating is 80%,

and allowances are set by contract at 10%. What is the time standard?

and allowances are set by contract at 10%. What is the time standard?

8.88 minutes

The data below represent time study observations for an assembly operation. Assume a 7%

allowance factor. What is the normal time for element 3?

(The data was in a table that couldn’t be transferred to quizlet. Problem 40)

allowance factor. What is the normal time for element 3?

(The data was in a table that couldn’t be transferred to quizlet. Problem 40)

1.96 min.

The accuracy of a labor standard is to be within 5%, and the confidence level is 95%. The standard

deviation of the sample is 2 and the mean is 8. What sample size should be used?

deviation of the sample is 2 and the mean is 8. What sample size should be used?

96

Which of these is the most common predetermined time standard?

MTM

A work sampling study requires an acceptable error level of 10 percent and z = 2 for 95.45 percent

confidence. The adequate sample size is _______ if the sample proportion is thought to be as large

as 50 percent, but ________ if the sample proportion is thought to be about 20 percent.

confidence. The adequate sample size is _______ if the sample proportion is thought to be as large

as 50 percent, but ________ if the sample proportion is thought to be about 20 percent.

100; 64

Sample observations of a claims processor made over a 160-hour work month reveal that the

worker produced a total of 384 completed claims forms. The performance rating was 80%. The

worker was idle 20% of the time (so that idle time should be subtracted from the total time when

computing the average observed time). The allowance factor is 8%. What is the normal time per

unit?

worker produced a total of 384 completed claims forms. The performance rating was 80%. The

worker was idle 20% of the time (so that idle time should be subtracted from the total time when

computing the average observed time). The allowance factor is 8%. What is the normal time per

unit?

16.0 minutes

Sample observations of a claims processor made over a 160-hour work month reveal that the

worker produced a total of 384 completed claims forms. The performance rating was 80%. The

worker was idle 20% of the time (so that idle time should be subtracted from the total time when

computing the average observed time). The allowance factor is 8%. What is the standard time per

unit?

worker produced a total of 384 completed claims forms. The performance rating was 80%. The

worker was idle 20% of the time (so that idle time should be subtracted from the total time when

computing the average observed time). The allowance factor is 8%. What is the standard time per

unit?

17.4 minutes

A Time Measurement Unit, or TMU, is

0.00001 hour

Therbligs

were named by Frank Gilbreth

Therbligs are

the smallest unit of basic motion used in methods time measurement exercises

Predetermined time standards are an outgrowth of basic motions called

therbligs

Among the advantages of predetermined time standards are all of the following except

they can only be determined after work actually takes place

All of the following are advantages of predetermined time standards except

they are customized to your company

Which of the following is true regarding work sampling?

It can be used to estimate the percentage of time workers spend in unavoidable delays.

A technique for estimating the proportion of time a worker spends on various activities is

work sampling

A bank manager wants to determine the percent of time the bank’s tellers are working and idle. He

decides to use work sampling, and his initial estimate is that the tellers are idle 20% of the time.

Approximately how many observations should be taken to be 95% confident that the results will

not be more than 5% away from the true result?

decides to use work sampling, and his initial estimate is that the tellers are idle 20% of the time.

Approximately how many observations should be taken to be 95% confident that the results will

not be more than 5% away from the true result?

246

The tally sheet data from a work sampling study provides information regarding

the percent of time spent on various tasks

An advantage of work sampling is that

the time spent observing the employee is relatively short

A disadvantage of work sampling is that

it tends to be less accurate, particularly when task times are short

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