Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 12, Problem 70AP
Summary Introduction
Interpretation: Process control needs to be analyzed using a 3-sigma p chart with the help of given data.
Concept Introduction: P-chart helps to analyze the process control when no. of defective products and helps organizations makes better improvement decisions.
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1. Peter Ittig's department store, Ittig Brothers, is Amherst's largest independent clothier. The store receives an average of
6
returns per day. Using z =
3,
the control chart limits are:
The type of control chart that is best to monitor this process is
c minus chartc−chart
x overbar minus chartx−chart
p minus chartp−chart
2.
An ad agency tracks the complaints, by week received, about the billboards in its city:
Week
No. of Complaints
1
8
2
4
3
11
4
16
5
8
6
9
This exercise contains only parts a, b, and c.
a) The type of control chart that is best to monitor this process is
p minus chartp−chart
x overbar minus chartx−chart
c minus chartc−chart
3.
The accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to pay the full amount of their bills. Many customers complain that the bills…
C:
Determine the UCL and LCL for a X−�− chart.
Note: Round your answers to 3 decimal places.
D:
Determine the UCL and LCL for R-chart.
Note: Leave no cells blank - be certain to enter "0" wherever required. Round your answers to 3 decimal places.
E:
What comments can you make about the process?
multiple choice
Process is in statistical control
Process is out of statistical control
An ad agency tracks the complaints, by week received, about the billboards in its city:
Week
No. of Complaints
1
2
4
6
9.
This exercise contains only parts a, b, and c.
a) The type of control chart that is best to monitor this process is
b) Using z = 3, the control chart limits for this process are (assume that the historical complaints rate is unknown):
UCL, = complaints per week (round your response to two decimal places).
%3D
LCL, = complaints per week (round your response to two decimal places and if your answer is negative, enter this value as 0).
c) According to the control limits, the process has been
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Chapter 12 Solutions
Production and Operations Analysis, Seventh Edition
Ch. 12.1 - Prob. 2PCh. 12.1 - Prob. 3PCh. 12.1 - Prob. 4PCh. 12.1 - Prob. 5PCh. 12.1 - Prob. 6PCh. 12.2 - Prob. 7PCh. 12.2 - Prob. 8PCh. 12.2 - Prob. 9PCh. 12.2 - Prob. 10PCh. 12.2 - Prob. 11P
Ch. 12.2 - Prob. 12PCh. 12.2 - Prob. 13PCh. 12.3 - Prob. 14PCh. 12.3 - Prob. 15PCh. 12.3 - Prob. 16PCh. 12.3 - Prob. 17PCh. 12.4 - Prob. 18PCh. 12.4 - Prob. 19PCh. 12.4 - Prob. 20PCh. 12.4 - Prob. 21PCh. 12.5 - Prob. 22PCh. 12.6 - Prob. 23PCh. 12.6 - Prob. 24PCh. 12.6 - Prob. 25PCh. 12.6 - Prob. 26PCh. 12.6 - Prob. 27PCh. 12.6 - Prob. 28PCh. 12.9 - Prob. 29PCh. 12.9 - Prob. 30PCh. 12.9 - Prob. 31PCh. 12.9 - Prob. 32PCh. 12.9 - Prob. 33PCh. 12.10 - Prob. 34PCh. 12.10 - Prob. 35PCh. 12.10 - Prob. 37PCh. 12.10 - Prob. 38PCh. 12.10 - Prob. 39PCh. 12.10 - Prob. 40PCh. 12.11 - Prob. 41PCh. 12.11 - Prob. 42PCh. 12.11 - Prob. 43PCh. 12.11 - Prob. 44PCh. 12.12 - Prob. 46PCh. 12.12 - Prob. 47PCh. 12.12 - Prob. 48PCh. 12 - Prob. 49APCh. 12 - Prob. 50APCh. 12 - Prob. 51APCh. 12 - Prob. 52APCh. 12 - Prob. 53APCh. 12 - Prob. 54APCh. 12 - Prob. 55APCh. 12 - Prob. 57APCh. 12 - Prob. 58APCh. 12 - Prob. 59APCh. 12 - Prob. 60APCh. 12 - Prob. 61APCh. 12 - Prob. 62APCh. 12 - Prob. 63APCh. 12 - Prob. 64APCh. 12 - Prob. 65APCh. 12 - Prob. 66APCh. 12 - Prob. 67APCh. 12 - Prob. 68APCh. 12 - Prob. 69APCh. 12 - Prob. 70AP
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