Exam 24: Measuring Output Rates

The predetermined data approach does not eliminate the need for time studies.

Garman observes a worker assembling peanut valves and records the data displayed in the table.What is the select time for this job element?

The most commonly used method for setting a time standard is called a(n)________.

A time study analyst has found the select time for a work element to be 14.0 minutes,with a sample standard deviation of 3.2 minutes.What is the minimum sample size needed if the estimate is to be within 4 percent of the average 95 percent of the time (z = 1.96)?

An industrial engineer is conducting a time study for a work element.The select time is 4.5 minutes,and the sample standard deviation of the observed time is 20 seconds.What is the appropriate sample size if the estimate is to be 5 percent of the true average time 95 percent of the time?

Table H.3 A worker was observed for four cycles in a repetitive task.The observer recorded the following times,in seconds,using the continuous method.The ratings for each element and frequency it is performed are also indicated in the table.The allowance fraction is 20 percent. -Use the information in Table H.3.What is the normal time for work element 2?

With the use of the methods time measurement approach:

Elemental standard time data cannot be used to develop time standards for new work before production begins.

A predetermined data approach to time standards can be completed only after actual production begins.

An analyst using a time study approach:

A worker was observed for four cycles of a repetitive operation.The observed times for work elements are 11,10,8,and 11 seconds,respectively.What sample size is appropriate for estimating the time for this work element within + 3 percent of the true mean time with 95 percent confidence (z = 1.96)?

Table H.3 A worker was observed for four cycles in a repetitive task.The observer recorded the following times,in seconds,using the continuous method.The ratings for each element and frequency it is performed are also indicated in the table.The allowance fraction is 20 percent. -Use the information in Table H.3.What is the standard time for the complete cycle?

A work sampling method is used to determine the proportion of the time a worker is idle.The following information was gathered on a random basis. If the manager wants a 95 percent confidence level (z = 1.96)and a degree of precision of + 0.03,how many more observations are needed?

To set a time standard for a machining operation,the least likely approach to be used is the:

Table H.1 A worker was observed for four cycles in a repetitive task that contains four distinct elements.The observer recorded the following items in seconds,using the continuous method. -Use the information in Table H.1.Assuming that work element 4 receives a performance rating factor of 1.2 and is performed once per cycle,what is the normal time for this work element?

When using work sampling,the times of day to collect data samples are selected at random over the length of the study.

A larger sample size is required when the time estimate must be more certain.

Table H.3 A worker was observed for four cycles in a repetitive task.The observer recorded the following times,in seconds,using the continuous method.The ratings for each element and frequency it is performed are also indicated in the table.The allowance fraction is 20 percent. -Use the information in Table H.3.What is the normal time for the complete cycle?

Table H.1 A worker was observed for four cycles in a repetitive task that contains four distinct elements.The observer recorded the following items in seconds,using the continuous method. -Use the information in Table H.1.Assume that work element 1 receives a performance rating factor of 1.2 and all other elements receive a rating of 1.1.If work element 2 is performed every other cycle but every other element is performed every cycle,and the company has an allowance time of 0.10,what is the standard time for the complete cycle?

A time study analyst is determining the standard time for a work element.The select time is 6.0 minutes,and the standard deviation of the select time is 2.2 minutes,based on a pilot sample of 20 observations.What is the appropriate sample size if the estimate for the select time is to be within 10 percent of the true average time 95 percent of the time (z = 1.96)?