Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 7, Problem 7P
Summary Introduction
To determine: The standard time for the job.
Introduction: The amount of the dependency on human effort by an organization in terms of achieving its goals is given by the work design. It is directly linked to the productivity of an organization where good work design helps in achieving high productivity.
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A worker-machine operation was found to involve 3.3 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker's time-averaged 1.9 minutes per cycle, and the worker was given a rating of 120% (machine rating is 100%). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 12% of work time, determine the standard time for this job. Hints: you should consider both machine time and machine time together. Also, Allowance only applies to the man, not a machine.
At Dominos pizza the time study restaurant yielded an average observed time of 4.0 minutes. The analyst
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made. The firm uses a 13% allowance factor. What is the standard time for this operation.
9.3 min
3.4 min
✓ 3.9 min
3.8 min
From a time study, the worker’s average observed time for a particular task is shown to be 5.6 minutes. The analyst feels the worker was performing their task, on average, about 25% faster than normal. What would be the resulting standard time assuming a 20% allowance for fatigue and personal needs?
Chapter 7 Solutions
Operations Management
Ch. 7.S - Prob. 1DRQCh. 7.S - Prob. 2DRQCh. 7.S - Prob. 3DRQCh. 7.S - Prob. 4DRQCh. 7.S - Prob. 5DRQCh. 7.S - Prob. 6DRQCh. 7.S - Prob. 7DRQCh. 7.S - Prob. 8DRQCh. 7.S - Prob. 9DRQCh. 7.S - Prob. 10DRQ
Ch. 7.S - Prob. 1PCh. 7.S - Prob. 2PCh. 7.S - Prob. 3PCh. 7.S - Prob. 4PCh. 7.S - Prob. 5PCh. 7.S - Prob. 6PCh. 7.S - Prob. 7PCh. 7.S - Prob. 8PCh. 7.S - Prob. 9PCh. 7.S - Prob. 10PCh. 7.S - Prob. 11PCh. 7.S - Prob. 12PCh. 7.S - Prob. 13PCh. 7.S - Prob. 14PCh. 7.S - Prob. 15PCh. 7.S - Prob. 16PCh. 7.S - Prob. 17PCh. 7.S - Prob. 18PCh. 7.S - Prob. 19PCh. 7.S - Prob. 1CQCh. 7.S - Prob. 2CQCh. 7.S - Prob. 3CQCh. 7 - Prob. 1DRQCh. 7 - What are some of the main advantage and...Ch. 7 - Prob. 3DRQCh. 7 - Prob. 4DRQCh. 7 - Prob. 5DRQCh. 7 - Prob. 6DRQCh. 7 - Prob. 7DRQCh. 7 - What are motion study principles? How are they...Ch. 7 - Prob. 9DRQCh. 7 - Prob. 10DRQCh. 7 - Prob. 11DRQCh. 7 - Prob. 12DRQCh. 7 - Prob. 13DRQCh. 7 - Prob. 14DRQCh. 7 - Prob. 15DRQCh. 7 - Prob. 16DRQCh. 7 - Prob. 17DRQCh. 7 - Prob. 18DRQCh. 7 - Prob. 19DRQCh. 7 - Prob. 1TSCh. 7 - Prob. 2TSCh. 7 - Prob. 3TSCh. 7 - Prob. 1CTECh. 7 - Prob. 2CTECh. 7 - Prob. 3CTECh. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Given these observed times (in minutes) for four...Ch. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - An analyst made the following observations about...Ch. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19P
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- A Methods and Measurements Analyst needs to develop a time standard for a certain task. The task involves use of a ruler, square, and portable electric saw to mark and cut the "notch" in a rafter (a standard carpentry task of home construction). In a preliminary study, he observed one of his workers performing this task five times. The observations were made in an air-conditioned, well-lit training facility, at ground level, with all tools and equipment clean and readily available. Observation: 1 2 3 4 5 Task time (seconds): 82 74 80 83 76 a. What is the actual average time for this task? b. What is the normal time for this task if the employee worked at a 20% faster pace than is typical for adequately trained workers? c. What is standard time for this task if allowances sum to 14%? d. If the analyst then thought more carefully about his experiment and decided that the allowances needed to be increased to match the real (outside, not air-conditioned)…arrow_forwardA 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 109 percent and an allowance of 21 percent of the total normal time? Average Time (seconds) 15 Observations 16 16 18 23 12 The standard time is seconds. (Enter your response rounded to two decimal places.)arrow_forwardThe snapback timing method was used to obtain the average times and performance ratings for work elements in a manual repetitive task. (See table below). All elements are worker-controlled and were performance rated at 80%. Element e is an irregular element performed every five cycles. A 15% allowance for personal time, fatigue, and delays isapplied to the cycle. Determine (a) the normal time and (b) the standard time for this cycle. If the worker’s performance during actual production is 120% on all manual elements for 7 actual hours worked on an 8-hour shift, (c) how many units will be producedarrow_forward
- company from your understanding. 3) Calculate the standard time for an operation from the following data. Average observed time for manual elements = 4 0 minutes Average auto cycle time = 3 minutes Rating on a scale of 100 = 90% Personal & other allowances = 15% of basic timearrow_forwardA Northeast Airline gate agent, Chip Gilliken, gives out seat assignments to ticketed passengers. He takes an average of 52 seconds per passenger and is rated 110% in performance. A typical agent is expected to take 17.2 seconds to make the seat assignments (round your response to one decimal place).arrow_forwardCompare stopwatch time study and work sampling.arrow_forward
- An analyst has timed a metal cutting operation for 60 bikes. The average time per cycle was 10.30 minutes, and the standard deviation was 1:20 minutes for a worker with a performance rating of 120 percent. Assume an allowance of 16 percent of job time. Find the standard time for this operation.arrow_forwardAn analyst has timed a metal-cutting operation for 50 cycles. The average time per cycle was10.40 minutes, and the standard deviation was 1.20 minutes for a worker with a performance ratingof 125 percent. Assume an allowance of 16 percent of job time. Find the standard time for thisoperationarrow_forwardThe time study of a work operation at a restaurant yielded an observed time of 4 minutes. The analysis rated the observed worker at 85%. This means the worker performed at 85% of normal when the study was made. The firm uses a 13% allowance factor. The restaurant wants to compute the normal time and the standard time for this operation;arrow_forward
- What would typically happen if an abnormally short time was recorded when conducting a stopwatch time study? a) It would be included in the study. b) It would be discarded. c) It would be factored by the performance rating. d) Inform the supervisor of the abnormality.arrow_forwardEach year, Lord & Taylor, Ltd., sets up a gift-wrappingstation to assist its customers with holiday shopping. Preliminaryobservations of one worker at the sta tion produced the followingsample time (in minutes per package): 3.5, 3.2, 4. 1, 3.6, 3.9.Based on this small sample, what number of observations wouldbe necessa ry to determine the true cycle time with a 95% confidencelevel and an accuracy of ± 5%?arrow_forwardSusan Cottenden clocked the observed time for weld-ing a part onto truck doors at 5.3 minutes. The performance rat-ing of the worker timed was estimated at 105%. Find the normal time for this operation.Note: According to the local union contract, each welder isallowed 3 minutes of personal time per hour and 2 minutes offatigue time per hour. Further, there should be an average delayallowance of 1 minute per hour. Compute the allowance factorand then find the standard time for the welding activity.arrow_forward
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