OPERATIONS MANAGMENT IN...-ACCESS
7th Edition
ISBN: 9781259716225
Author: SCHROEDER
Publisher: MCG
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Question
Chapter 9, Problem 11P
a)
Summary Introduction
To determine: The CL and control limits for the X bar and R chart.
b)
Summary Introduction
To determine: The samples that are out of control.
c)
Summary Introduction
To determine: If the process is stable enough to begin the use data and collect samples,
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Bottles for room spray are supposed to weigh exactly oz. Inspectors want to develop process control charts . They take six boxes of five bottles each and weigh them . They obtain the following data . The mean weights of each of the 6 samples are 15.2, 14.6, 16.5, 18.1, 13.2 , and 14.8 respectively . Likewise , the range values for the each of 6 samples are 1.8, 0.7, 0.5, 0.4, 0.2 , and 0.9 respectively . Find out Grand Mean (X double bar ), and mean range (R bar )
Abernathy, Inc., produces two different generators and is concerned about their quality. The company has identified the following quality activities and costs associated with the two products:
Generator A
Generator B
Units produced
170,000
340,000
Warranty work (units)
1,700
850
Scrapped units (number)
3,400
850
Inspection (hours)
3,400
1,700
Quality training (hours)
85
85
Activities:
Performing warranty work
$816,000
Scrapping units
612,000
Inspecting
306,000
Quality training
85,000
Required:
1. Calculate the quality cost per unit for each product, and break this unit cost into quality cost categories. If required, round your answers to the nearest cent.
Generator A
Generator B
Unit cost
$fill in the blank 1
$fill in the blank 2
Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the bottleneck, a critical quality dimension that determines whether the bottle cap will fit properly. The dimensions (inch) from the last six samples are:
BOTTLE
Sample
1
2
3
4
1
0.694
0.622
0.698
0.69
2
0.687
0.611
0.697
0.613
3
0.671
0.680
0.695
0.602
4
0.610
0.615
0.685
0.678
5
0.680
0.624
0.618
0.614
6
0.685
0.693
0.607
0.669
What would be the center line of a 3-sigma S chart?
Answer:
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