Meet Minitab 14.pdf

4
Assessing Quality
Objectives
In this chapter, you:
■ Set options for control charts, page 4-2
■ Create and interpret control charts, page 4-3
■ Update a control chart, page 4-5
■ View subgroup information, page 4-7
■ Add a reference line to a control chart, page 4-7
■ Conduct and interpret a capability analysis, page 4-9
Overview
Quality is the degree to which products or services meet the needs of customers.
Common objectives for quality professionals include reducing defect rates,
manufacturing products within specifications, and standardizing delivery time.
MINITAB offers a wide array of methods to help you evaluate quality in an objective,
quantitative way: control charts, quality planning tools, measurement systems
analysis (gage studies), process capability, and reliability/survival analysis. This
chapter discusses control charts and process capability.
Features of MINITAB control charts include:
■ The ability to choose how to estimate parameters and control limits, as well as
display tests for special causes and historical stages.
■
Customizable attributes, such as adding a reference line, changing the scale, and
modifying titles. As with other MINITAB graphs, you can customize control charts
when and after you create them.
Meet MINITAB 4-1