EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
EP PRIN.OF OPERATIONS MGMT.-MYOMLAB
10th Edition
ISBN: 9780134183848
Author: HEIZER
Publisher: PEARSON CO
Question
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Chapter 10, Problem 30P

a)

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.

b)

Summary Introduction

To determine: The number of sample size.

Introduction: Thesample size is required to determine the number of observations that are necessary to find the true cycle time.

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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?
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