EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
10th Edition
ISBN: 9780134183848
Author: HEIZER
Publisher: PEARSON CO
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Chapter 10, Problem 22P
Summary Introduction

To determine: The 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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State and describe some of the limitations of time study method ?
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?
Installing mufflers at the Stanley Garage in Golden, Colorado, involves five work elements. Linda Stanley has timed workers performing these tasks seven times, with the results shown in the following table. Job elements OBSERVATIONS (MINUTES) Performance rating (%) 1 2 3 4 5 6 7 1 Select correct mufflers 4 5 4 6 4 15 4 100 2 Remove muffler 6 8 7 6 7 6 7 90 3 Weld/install new muffler 15 14 14 12 15 16 13 105 4 Check/inspect work 3 4 24 5 4 3 18 100 5 Complete paperwork 5 6 8 - 7 6 7 130 By agreement with her workers, Stanley allows a 10% fatigue factor and a 10% personal-time factor. To compute standard time for the work operation, Stanley excludes all observations that appear to be unusual or nonrecurring. She does not want an error of more than 5%. What is the standard time for the task? How many observations are needed to assure a 95.45%…
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