Exercise 5

Section 3 Control Charts

Lesson S03-06

Text: Section 3 page 33, Section 9 page 10

Duration: 11 minutes

Introduction to Exercise 5

Exercise 5

Batches of Blended Rubber to be used for O-Rings are tested for tensile strength. One sample was taken and tested from 30 consecutive batches. The data is shown below and is also included in file Exercise05.MTW.

Construct Individuals and Moving Range Charts and assess the stability of the process.

Note: The values have been shown to be normally distributed.

Solution / Discussion of Exercise 5

A Few Hints for Using Minitab