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, & Smith Prentice-Hall Publishing Company Copyright, 2011

Chapter 18 Minitab Examples X-bar and R Charts X-bar and R Charts X-bar and R Charts X-bar and R Charts Cattlemans Bar and Grill P Charts P Charts P Charts P Charts Hilders Publishing Company C Charts C Charts C Charts C Charts Chandler Tile Company

X-Bar and R Charts - Cattlemens 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 – Cattlemans Bar and Grill

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

X-Bar and R Charts – Cattlemans 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 – Cattlemans Bar and Grill

X-Bar and R-Charts X-Bar and R Charts – Cattlemans Bar and Grill

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. 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