Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Question
Chapter 10, Problem 33P
a)
Summary Introduction
To determine: The standard time.
Introduction: Time study is the basis that helps set the standard time; it would time a sample of the performance of the worker.
b)
Summary Introduction
To determine: The normal time of the worker.
Introduction: Time study is the basis that helps set the standard time; it would time a sample of the performance of the worker.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The cycle time for performing a certain task has been clocked at 13 minutes. The performance rating of Richard Muszynski III was estimated at 120%. Common practice in this department is to allow 6 minutes of personal time and 4 minutes of fatigue time per hour. In addition, there should be an extra allowance of 3 minutes per hour for inspection.
b) The allowance fraction is ?
Q2 (a) A time study analyst timed an assembly operation for 30 cycles, and then computed the average time per cycle, which was 18.75 minutes. The analyst assigned a performance rating of 0.96 and decided that an appropriate allowance was 15 percent. Assume the allowance factor is based on the workday. Determine the following: (i) Observed time (OT) (ii) The Normal times (NT) (iii) The standard time (ST)
(b) If the analyst wants to estimate the number of observations that will be needed to achieve a specified maximum error, with a confidence of 95.5 %. A preliminary study yielded a mean of 5.2 minutes and a standard deviation of 1.1 minutes. Determine the total number of observation needed for these two cases: (a) A maximum error of + or - 6 % (b) A maximum error of 40 minutes
A widget assembly process was timed for 75 cycles and had an average of 1.5 minutes per piece. The performance rating was 95%, and workday allowances are 10 percent. Determine the following:
a) Observed time
b) Normal time
c) Standard time
d) How might this information be used?
Chapter 10 Solutions
Principles Of Operations Management
Ch. 10 - Prob. 1EDCh. 10 - Prob. 1DQCh. 10 - Prob. 2DQCh. 10 - Prob. 3DQCh. 10 - Prob. 4DQCh. 10 - Prob. 5DQCh. 10 - Prob. 6DQCh. 10 - Prob. 7DQCh. 10 - Prob. 8DQCh. 10 - Prob. 9DQ
Ch. 10 - Prob. 10DQCh. 10 - Prob. 11DQCh. 10 - Prob. 12DQCh. 10 - Prob. 13DQCh. 10 - Prob. 14DQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Virginia College promotes a wide variety of...Ch. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 30PCh. 10 - Prob. 31PCh. 10 - Prob. 32PCh. 10 - Prob. 33PCh. 10 - Prob. 34PCh. 10 - Prob. 35PCh. 10 - Prob. 36PCh. 10 - Prob. 37PCh. 10 - Prob. 39PCh. 10 - Prob. 40PCh. 10 - Prob. 41PCh. 10 - Prob. 42PCh. 10 - Prob. 44PCh. 10 - Prob. 1CSCh. 10 - Prob. 2CSCh. 10 - Prob. 3CSCh. 10 - Prob. 4CSCh. 10 - Prob. 1.1VCCh. 10 - Prob. 1.2VCCh. 10 - Prob. 1.3VCCh. 10 - Prob. 2.1VCCh. 10 - Prob. 2.2VCCh. 10 - Prob. 2.3VCCh. 10 - Prob. 2.4VC
Knowledge Booster
Similar questions
- Installing mufflers at the O'Sullivan Garage in Golden, Colorado, involves five work elements. Jill O'Sull ivanhas timed workers performing these tasks seven times, with the results shown in the following table: By agreement with her workers, Jill allows a 10% fatigue factor and a 10% personal-time factor, but no time for delay. To compute standard time for the work operatio n, Jill excludes all observations that a ppear to be unusual or nonrecurring. She does not want an error of mo re than ±5%.a) What is the standard time for the task?b) How many observations are needed to assu re a 95% confidence level?arrow_forwardA total of 300 observations of Bob Ramos, anassembly-line worker, were made over a 40-hour workweek. Thesample also showed that Bob was busy working (assembling theparts) during 250 observations.a) Find the percentage of time Bob was working. b) If you want a confidence level of 95%, and if {3% is an accept-able error, what size should the sample be? c) Was the sample size adequate?arrow_forwardThe Konishi Electronics Company manufactures computermicrochips. A particular job that has been under analysis aspart of a quality-improvement program was the subject of atime study. The time study encompassed 20 job cycles, and the results include the following cumulative times and per-formance rating factors for each element: a. Compute the standard time for this job using an al-lowance factor of 15%. b. Using a sample standard deviation of 0.51 minutes, de-termine the number of cycles for this time study such that the company would be 95% confident that the av-erage time from the time study is within 5% of the true average cycle time.arrow_forward
- Can someone explain how or in what way work measurements are used in every bullet? Thank youarrow_forwardThe Dubuque Cement Company packs 80-pound bagsof concrete mix. Time-study data for the filling activity are shown inthe following table. Because of the high physical demands of the job,the company's policy is a 23% allowance for workers.a) Compute the standard time for the bag-packing task.b) How many observations are necessary for 99% confidence,within ±5% accuracy?arrow_forwardThe cycle time for performing a certain task has been clocked at 13 minutes. The performance rating of Richard Muszynski III was estimated at 120%. Common practice in this department is to allow 6 minutes of personal time and 4 minutes of fatigue time per hour. In addition, there should be an extra allowance of 3 minutes per hour for inspection. a) The normal time for the operation is = ? minutes (round your response to one decimal place).arrow_forward
- A time study of an employee assembling peanut valves resulted in the following set of observations. What is the standard time, given a performance rating of 97 percent and an allowance of 10 percent of the total normal time? LOADING... Average Time (seconds) Observations 10 15 11 10 15 19 Part 2 The standard time is enter your response here seconds. (Enter your response rounded to two decimal places.)arrow_forwardDescribe some of the limitations of time study method ?arrow_forwardThe “worker” in this scenario had to perform a candy-sorting task and the rest of the class hadto record the observed times (OT) for the task. It was decided that the rating for the “worker” was 100%. Given the following table, find the Normal Time for each element. Write your answers in order from Element #1 --> Element #5. Answers must have one decimal place: e.g. 3.0 or 12.5 Element Trail 1 Trial 2 Normal Time 1 Walk to podium 3 sec 3 sec 2 Fill mug 5 sec 6 sec 3 Walk to desk/sit 5 sec 4 sec 4 Sort Candy 12 sec 12 sec 5 Walk to desk 4 sec 4 secarrow_forward
- Describe the steps involved in conducting a time study,and discuss any difficulties you might envision at varioussteps.arrow_forwardHow many observations should a time study analyst plan for in an operation that has a standard deviation of 1.1 minutes per piece? The goal is to estimate the mean time per piece to within 0.4 minutes, with a confidence of 95.5 percent. (Do not round intermediate calculations. Round up your final answer to the next whole number.).arrow_forwardThe “worker” in this scenario had to perform a candy-sorting task and the rest of the class had to record the observed times (OT) for the task. It was decided that the rating for the “worker” was 100%. Given the following table, find the standard time for each element. Write your answers in order from Element #1 --> Element #5. Answers must have one decimal place: e.g. 3.0 or 12.5. Round up if necessary. Assume a total allowance of 5%. In your equation you will use for ST, consider allowance to be 0.05. Element Trail 1 Trial 2 Standard Time 1 Walk to podium 3 sec 3 sec 2 Fill mug 5 sec 6 sec 3 Walk to desk/sit 5 sec 4 sec 4 Sort Candy 12 sec 12 sec 5 Walk to desk 4 sec 4 secarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
Operations ManagementOperations ManagementISBN:9781259667473Author:William J StevensonPublisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...Operations ManagementISBN:9781259666100Author:F. Robert Jacobs, Richard B ChasePublisher:McGraw-Hill Education
Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage Learning
Production and Operations Analysis, Seventh Editi...Operations ManagementISBN:9781478623069Author:Steven Nahmias, Tava Lennon OlsenPublisher:Waveland Press, Inc.
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Operations Management
Operations Management
ISBN:9781259667473
Author:William J Stevenson
Publisher:McGraw-Hill Education
Operations and Supply Chain Management (Mcgraw-hi...
Operations Management
ISBN:9781259666100
Author:F. Robert Jacobs, Richard B Chase
Publisher:McGraw-Hill Education
Purchasing and Supply Chain Management
Operations Management
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Cengage Learning
Production and Operations Analysis, Seventh Editi...
Operations Management
ISBN:9781478623069
Author:Steven Nahmias, Tava Lennon Olsen
Publisher:Waveland Press, Inc.