Guide to Using Minitab 14 For Basic Statistical Applications

Guide to Using Minitab 14 For Basic Statistical Applications

To Accompany

Business Statistics: A Decision Making Approach, 8th Ed.

Chapter 18:

Introduction to Quality and Statistical Process Control

By

Groebner, Shannon, Fry, & SmithPrentice-Hall Publishing Company

Copyright, 2011

Chapter 18 Minitab 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 Minitab to develop a procedure to visually monitor key measures of product and service quality.

Data file is Cattleman.MTW

Open File Cattleman.MTW

X-Bar and R Charts – Cattleman’s Bar and Grill

X-Bar and R Charts – Cattleman’s Bar and Grill

Choose Stat, then Control Charts, Variable Charts for subgroups and finally XBar-R

X-Bar and R Charts – Cattleman’s Bar and Grill

Define Data format and specify columns containing the subgroups – then select Data Options

Check – Specify rows to exclude – then specify row numbers

X-Bar and R Charts – Cattleman’s Bar and Grill

X-Bar and R-Charts

X-Bar and R Charts – Cattleman’s Bar and Grill

P Charts - Hilder Publishing Company.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 Minitab to develop a procedure to visually monitor order entry form error percentage.

Data file is Hilders.MTW

Open File Hilders.MTW

P Charts – Hilders Publishing Company

Click on Stat, then Control Charts Attributes and finally P.

P Charts – Hilders Publishing Company

Identify column containing the defect numbers and the subgroup size. Click on P Chart Options

P Charts – Hilders Publishing Company

Minitab constructs the P Chart.

P Charts – Hilders Publishing Company

c Charts - Chandler Tile Company.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 Minitab to develop a procedure to visually monitor order surface scratches in tile.

Data file is Chandler.MTW

Open File Chandler.MTW

c-Charts – Chandler Tile Company

Click on Stat, then Control Charts, Attributes and finally C.

c-Charts – Chandler Tile Company

Identify the column containing the number of scratches. Select C-Chart Options

c-Charts – Chandler Tile Company

Specify to perform all tests

c-Charts – Chandler Tile Company

Minitab constructs the c Chart.

c-Charts – Chandler Tile Company