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Guide to Using Excel For Basic
Statistical Applications
To Accompany
Business Statistics: A Decision Making
Approach, 5th Ed.
Chapter 17:
Introduction to Quality and Statistical
Process Control
By
Groebner, Shannon, Fry, & Smith
Prentice-Hall Publishing Company
Copyright, 2005
Chapter 17 Excel
Examples
 X-bar
and R Charts
Cattleman’s Bar and Grill
 P Charts
Hilder’s Publishing Company
 C Charts
Chandler Tile Company
X-Bar and R Charts Cattlemen’s Bar and Grill
Issue:
In order to maintain its reputation
excellent food and service. reputation, the
owners need to measure product and service
quality on a regular basis.
Objective:
Use Excel to develop a procedure to
visually monitor key measures of product and
service quality. Data file is Cattleman.xls
X-Bar and R Charts – Cattleman’s Bar and Grill
Open File Cattleman.xls
X-Bar and R Charts – Cattleman’s Bar and Grill
Use formulas to
determine the
Mean and Range
of the sample
values. The
formula for the
Range is shown.
The formula for
the Mean is
Average(B2:E2).
X-Bar and R Charts – Cattleman’s Bar and Grill
Click on
PHStat,
then select
Control
Charts and
R & Xbar
Charts.
X-Bar and R Charts – Cattleman’s Bar and Grill
Enter the
Subgroup Size
and the cells
that contain
the range
values. Select
R and Xbar
Charts and
enter the range
of cells that
contain the
mean values.
Click OK.
X-Bar and R Charts – Cattleman’s Bar and Grill
The Xbar Chart is
automatically
formed.
X-Bar and R Charts – Cattleman’s Bar and Grill
The R Chart is also
automatically formed.
P Charts Hilder Publishing Company
Issue:
The manager of the order entry department
has decided to develop a process control chart to
monitor the order entry errors.
Objective:
Use Excel to develop a procedure to visually
monitor order entry form error percentage. Data file
is Hilders.xls
P Charts – Hilders Publishing Company
Open File Hilders.xls
P Charts – Hilders Publishing Company
Click on
PHStat, then
Control
Charts then p
Chart
P Charts – Hilders Publishing Company
Identify the
Data ranges and
the sample size.
P Charts – Hilders Publishing Company
PHStat constructs the p
Chart.
c Charts Chandler Tile Company
Issue:
The company wants to develop a procedure to
monitor the number of defects in its production of
tiles. Objective:
Use Excel to develop a procedure to visually
monitor order surface scratches in tile. Data file is
Chandler.xls
c-Charts – Chandler Tile Company
Open File Chandler.xls
c-Charts – Chandler Tile Company
Use this
formula to
find the
average
number of
scratches in
the data.
c-Charts – Chandler Tile Company
Copy 5.7 into the
40 cells.
c-Charts – Chandler Tile Company
Use this
formula to
determine
the Upper
Control Limit
and copy the
value into
the 40 cells
c-Charts – Chandler Tile Company
Use this
formula to
find the
Lower
Control
Limit. Since
the value is
negative, copy
0 into the 40
cells.
c-Charts – Chandler Tile Company
To construct
the control
chart, click on
the Chart
Wizard and
select Line.
c-Charts – Chandler Tile Company
Click on
Series. Then
identify
series name
and range
for each set
of values
needed in
the chart.
c-Charts – Chandler Tile Company
Label the chart
and the X and Y
axis.
c-Charts – Chandler Tile Company
Left click on any
point on the
graph then right
click. Format the
lines as desired.