Exam 16: Work Measurement

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 select time for work element 2?

The performance-rating factor in a time study is a totally objective measure.

As the sample size increases in a work sampling study,the maximum error decreases.

A job shop manager wants to determine the proportion of time the workers are idle.The shop employs two types of workers.Type 1 includes three workers and Type 2 includes two workers.The manager suspects that the proportion of idle time is about 20 percent for Type 1 workers and 15 percent for Type 2 workers.If the manager wants a 95 percent confidence level and a degree of precision of + 0.05,how many trips will the observers have to take through the group?

What are the advantages and disadvantages of establishing and enforcing work standards?

Work sampling is one method of work measurement.A major disadvantage of this method is that

The more frequently the activity occurs,the longer the time period should be when conducting a work sampling study.

Special training is required for observers using work sampling.

Fatigue,rest,or unavoidable delays are factored into a work standard by the performance-rating factor.

An industrial engineer is conducting a time study for a work element.The select time is 7.5 minutes,and the sample standard deviation of the observed time is one minute.What is the appropriate sample size if the estimate is to be 3 percent of the true average time 95 percent of the time?

Keith assembles peanut valves and the recorded data is displayed in the table.What is the select time for this job element if he is rated at 75%?

With the use of the elemental standard data approach,

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 and a degree of precision of ± 0.03,how many more observations are needed?

A time-study analysis was performed on a task with two work elements.The select times for these work elements are 21.0 seconds and 13.0 seconds,with rating factors of 1.1 and 1.2,respectively.Each work element is performed twice per cycle.If an allowance of 20 percent is used,what is the standard time for this task?

________ involves estimating the proportion of time spent by people and machines on activities,based on a large number of observations.

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?

Table H.2 -Use the information in Table H.2.If the allowance for this task is 20 percent,what is the standard time for the entire task?

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?

A manager is interested in setting a time standard for a machining operation.Which one of the following is LEAST likely to be of use?

Work sampling can be used to estimate the proportion of time spent by people or machines on activities.