Final Chapter 10 Supplement – Flashcards
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Which of the following is not a use of labor standards?
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All of the above are uses of labor standards. (labor content, cost and time estimates, crew size and work balance, wage-incentive plans)
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Labor standards can help a firm determine expected production, which in turn enables
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managers and workers to know what constitutes a fair day's work.
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Which of the following techniques may not provide reliable and accurate time standards?
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historical experience
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Timing a sample of a worker's performance and using it to set a standard is the work measurement technique of
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time studies
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For a time study, the three factors that determine how large a sample size to take are
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needed accuracy, desired confidence, and absolute amount of error
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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
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none of the above (1/4 as large, 1/2 as large, twice as large, four times as large)
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In time studies, average observed time for an element is
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for all observations, the sum of all times recorded divided by the number of observations
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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)
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the average observed time for each element
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In time studies, normal time is
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average observed time multiplied by a performance rating factor
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Standard time
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accounts for performance rating factors and for allowances
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The smaller the percentage established for allowances
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the closer is normal time to standard time
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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
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average observed time
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Which of the following are true regarding allowances in time studies?
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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)
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In work measurement, personal time allowances are often established in the range of
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4 - 7%
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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?
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8.88 minutes
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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)
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1.96 min.
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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?
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96
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Which of these is the most common predetermined time standard?
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MTM
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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.
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100; 64
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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?
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16.0 minutes
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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?
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17.4 minutes
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A Time Measurement Unit, or TMU, is
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0.00001 hour
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Therbligs
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were named by Frank Gilbreth
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Therbligs are
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the smallest unit of basic motion used in methods time measurement exercises
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Predetermined time standards are an outgrowth of basic motions called
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therbligs
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Among the advantages of predetermined time standards are all of the following except
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they can only be determined after work actually takes place
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All of the following are advantages of predetermined time standards except
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they are customized to your company
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Which of the following is true regarding work sampling?
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It can be used to estimate the percentage of time workers spend in unavoidable delays.
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A technique for estimating the proportion of time a worker spends on various activities is
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work sampling
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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?
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246
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The tally sheet data from a work sampling study provides information regarding
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the percent of time spent on various tasks
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An advantage of work sampling is that
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the time spent observing the employee is relatively short
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A disadvantage of work sampling is that
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it tends to be less accurate, particularly when task times are short
