MyOMLab Principles of operations management : Sustainability and supply chain management (Book & eText Access Card)
10th Edition
ISBN: 9780134184111
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Chapter 10, Problem 21P
Summary Introduction
To determine: The normal time, allowance factor, and standard time for the operation
Introduction: Time study is the basis that helps set the standard time; it would time a sample of the performance of the worker.
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Susan Cottenden clocked the observed time forwelding a part onto truck doors at 5.3 minutes. The performance rating 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 minutesof fatigue time per hour. Further, there should be an averagedelay allowance of 1 minute per hour. Compute the allowance factor and then find the standard time for the weldingactivity.
Susan Cottenden clocked the observed time for welding a part onto truck doors at 5.3 minutes. The performance rating of the worker timed was estimated at I 05%. Find the normal time for this operation. Note: According to the local union contract, each welder isallowed 3 mi nutes of personal time per hour and 2 minutes offatigue time per hour. Further, there should be an average delayallowance of I minute per hour. Compute the allowance factorand then find the standard time for the welding activity.
Give at least 3 examples of jobs that requires Work Measurement and give a brief explaination.
Chapter 10 Solutions
MyOMLab Principles of operations management : Sustainability and supply chain management (Book & eText Access Card)
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
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- You recorded an observed time of 1 minute per unit of production. If the performance rating of the observed worker was 120 and 5% PNA was provided, what is the standard time per unit?arrow_forwardAn 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_forwardA job was timed for 60 cycles and had an average of 1.25 minutes per piece. The performance rating was 95 percent, and workday allowances are 9 percent. Determine each of the following: a. Observed time. (Round your answer to 2 decimal place.) Observed time minutes b. Normal time. (Round your answer to 2 decimal places.) Normal time minutes c. Standard time. (Round your answer to 2 decimal places.) Standard time minutesarrow_forward
- You are given the following information (a) Develop the mean observed time for each element.(b) Calculate the normal time for each element.(c) Using an allowance factor of 15 percent of job time, calculatethe standard time for each element and for the entire job.(d) How many units should be completed each hour if theworker performs at 100 percent of the standard?(e) How many units should be completed each hour if theworker performs at 110 percent of the standard?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_forwardAfter training, Mary Fernandez, a computer tech-nician, had an average observed time for memory-chip tests of 12 seconds. Mary’s performance rating is 100%. The firm has apersonal fatigue and delay allowance of 15%.a) Find the normal time for this process.b) Find the standard time for this process.arrow_forward
- During a time study in a machine shop, five observations of a milling operation performed by an operator whose rating factor is 95 percent yielded the following times (in minutes): 40, 48, 48, 46, and 42. The allowance for this type of operation is 15 percent. a. Determine the normal time for this operation. b. Determine the standard time for this operation.arrow_forwardYou want to know the standard time of a welding process. The analyst has obtained the followingi information: average timed time - 1.30 minutes rhythm assessment - 110 fixed supplements - 5% variable supplements - 2% Determine the standard time, in minutes, of the welding process: a) 143 min b) 145 min c) 150 min d) 153 minarrow_forwardNine observations from a work measurement study using continuous timing are shown below. Allowances are determined as: personal, five percent; fatigue, five percent; delay, seven percent. Use the Work Measurement Excel template to determine the standard time for this operation. Work Observation Element 1 2 3 4 5 6 7 8 9 Performance Rating A 0.11 0.14 0.10 0.09 0.12 0.11 0.15 0.14 0.15 105% B 0.24 0.20 0.21 0.22 0.24 0.23 0.28 0.26 0.26 85% C 0.46 0.48 0.46 0.44 0.48 0.48 0.48 0.46 0.49 100% D 0.64 0.66 0.65 0.59 0.71 0.69 0.69 0.66 0.71 115% E 0.70 0.74 0.74 0.68 0.79 0.83 0.77 0.80 0.84 100% F 1.01 1.05 1.01 1.00 1.09 1.12 1.05 1.06 1.12 95% Round your answer to two decimal places. minutesarrow_forward
- How would you classify the following job elements? Arethey personal, fatigue, or delay?a) The operator stops to talk to you.b) The operator lights up a cigarette.c) The operator opens his lunch pail (it is not lunch time),removes an apple, and takes an occasional bite.arrow_forwardHow many work cycles should be timed to estimate the average cycle time to within 2 percent ofthe sample mean with a confidence of 99 percent if a pilot study yielded these times (minutes):5.2, 5.5, 5.8, 5.3, 5.5, and 5.1? The standard deviation is .253 minutes per cycle.arrow_forwardA time study was made of an existing job to develop new time standards. A worker was observed for 45 minutes.During that period, 30 units were produced. The analyst rated the worker as performing at a 90 percent performance rate. Allowances in the firm for rest and personal time are 12 percent. a. What is the normal time for the task?b. What is the standard time for the task?c. If the worker produced 300 units in an eight-hour day, what would be the day’s pay if the basic rate was $6 per hour and the premium payment system paid on a 100 percent basis?arrow_forward
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