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15
Chi-Square Test to Verify Source Association
with Parts Purchased and Products Produced
This case study is about a Six Sigma project at a company that wishes to
reduce the number of defective products produced.
Sections 15.1 and 15.2 give brief descriptions of the dene phase and the
measure phase, respectively. Section 15.3 illustrates the analyze phase with
detailed instructions for using Minitab
®
. Finally, Section 15.4 gives a brief
description of the improve and control phases.
15.1 Define Phase
Lately, the company has been receiving complaints from customers that its
products are defective. A critical part in the product, which is pu ...