Exercise 15

Section 8 Trending Charts

Lesson S08-03

Text: Section 8 page 13 and Section 9 page 26

Duration: 11 minutes

Introduction to Exercise 15

The exercise 15 Mintab worksheet:

For the following data, construct a control chart for the trending data, and determine whether the process is in or out of control. The use of MINITAB is highly recommended. The data may be found in the file called Exercise15.MTW.

Hints:

Use Simple Linear Regression to model the trend
Transform the data and use MINITAB to generate X̄ and S charts.

Solution / Discussion of Exercise 15

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About Steven Wachs

Steven Wachs has 25 years of wide-ranging industry experience in both technical and management positions. Steve has worked as a statistician at Ford Motor Company where he has extensive experience in the development of statistical models, reliability analysis, designed experimentation, and statistical process control.