Exam 15: Work Measurement

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

The following times in seconds were observed for a particular one-element job using the continuous method: 12,22,35,and 50.The worker's rating factor is 1.1.What is the standard time for the job if an allowance of 20 percent is provided?

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 3?

The methods time measurement approach assumes that a sequence of motions will take the same amount of time regardless of the order in which they are performed.

A time study is the method most often used for setting time standards for a job.

The ________ system features a database with micromotions such as reach,move,apply pressure,grasp,and turn.

With the use of the elemental standard data approach,

The time added to adjust for factors such as fatigue or equipment malfunction is called ________.

A(n)________ is the time required for a trained worker to perform a task following a prescribed method with normal effort and skill.

What are the four steps in a time study?

The ________ is a measurement found by multiplying the select time,the frequency of work,and the rating factor.

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?

A pilot work study has been conducted on a new operation with four work elements.The following times,in seconds,were obtained using the continuous method. Observations Element 1 2 3 4 5 RF 1 11.00 45.00 80.00 117.00 153.00 1.10 2 20.00 54.00 89.00 125.00 161.00 1.05 3 25.00 58.00 95.00 131.00 166.00 0.85 a.What is the normal time for this operation? b.If an allowance of 20 percent is used,what is the standard time for this task? c.What sample size is appropriate for estimating the time for element 3 within ± 3 percent of the true mean time with 95 percent confidence?

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 work element 2?

A manager wants to determine the proportion of time a cashier is idle.A work-sampling method was used,and the idle time was found to be 20 percent based on 100 observations.If the manager wants a + 0.05 with a 95 percent confidence level,how many MORE observations are needed?

When using work sampling,the times of day when the analyst collects the sample data should be selected at random over the length of the study.

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. Day No. Times Clerk Idle Total No. Observations Monday 8 26 Tuesday 8 32 Wednesday 7 28 Thursday 7 34 If the manager wants a 95 percent confidence level and a degree of precision of ± 0.03,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 -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?

Timing the work elements using the snap-back method requires

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%? Time (minutes) Observations 2.5 15 3.0 23 3.5 27