Exam 15: Work Measurement

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

With the use of the methods time measurement approach,

Work Element t() RF F 1 5.6 1.1 1 2 3.1 1.0 1 3 1.9 1.1 1 4 4.0 0.8 2 -Use the information in Table H.2.Which work element will take the longest for an average worker to perform per cycle?

An observer has recorded the following select ( $\frac { \bar { t } } { }$ )for a five-part task and has applied a rating factor (RF)to each.The times are in seconds.If there is a 15 percent allowance for "nonproductive" activities,compute the standard time for the total task. Element RF 1 6.2 0.9 2 1.7 1.1 3 4.5 1.3 4 1.2 0.8 5 5.0 1.2 The standard time for the task is

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 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?

How can work standards be developed for higher level services and creative processes?

At a new watch assembly plant,a job is divided into three work elements.The element times for the first four cycles are recorded by the continuous method and are presented below along with a performance rating factor (RF)for each element. Observation (time in min) Work Element 1 2 3 4 1 0.50 2.32 4.22 6.16 1.0 2 1.45 3.24 5.20 7.06 1.1 3 1.87 3.62 5.61 7.49 0.9 The standard time for this job,assuming that the allowance is 18 percent,is

Work standards would NOT be helpful for management in which area?

When a work analyst needs a high degree of precision in comparing actual work method results to standard,the best method to use would be

Work Element t() RF F 1 5.6 1.1 1 2 3.1 1.0 1 3 1.9 1.1 1 4 4.0 0.8 2 -If a worker spends 10 hours per day performing a task,and the allowance for this task is 19 percent,how many hours during the average day is the worker involved in nonproductive activities?

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

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. Element Cycle 1 Cycle 2 Cycle 3 Cycle 4 Rating Frequency 15 106 208 309 1.10 1.0 37 131 234 334 1.05 0.5 47 143 245 348 1.20 0.5 90 190 293 392 1.15 1.0 -Use the information in Table H.3.What is the standard time for the complete cycle?

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?

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. Element Cycle 1 Cycle 2 Cycle3 Cycle4 12 66 111 168 21 75 122 185 37 86 133 200 53 89 146 209 -Use the information in Table H.1.What is the select time for work element 2?

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

When using a work-sampling study,

An undergraduate business student studies diligently in the library during dead week in anticipation of an outstanding performance on her final exams.She asks a friend to spy on her at random intervals to determine what percentage of time she is actually studying.Over the course of three days,her friend records the following observations: Observation Period Times Studying Times Not Studying Observations Monday 20 3 23 Tuesday 21 4 25 Wednesday 10 1 11 Total 51 8 59 If the student wants a 95 percent confidence level and a degree of precision of ± 0.08,how many more observations are needed?

Work Element t() RF F 1 5.6 1.1 1 2 3.1 1.0 1 3 1.9 1.1 1 4 4.0 0.8 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?

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. Element Cycle 1 Cycle 2 Cycle 3 Cycle 4 Rating Frequency 15 106 208 309 1.10 1.0 37 131 234 334 1.05 0.5 47 143 245 348 1.20 0.5 90 190 293 392 1.15 1.0 -Use the information in Table H.3.What is the normal time for the complete cycle?