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2
Quality Analysis and Improvement
Tools/Techniques Used in This Book
This chapter gives a brief denition/description of each of the quality
analysis and improvement tools/techniques used in the case studies pre-
sented in this book. Because this is not a statistics textbook, in-depth cov-
erage of each of these tools or techniques is beyond the scope of the book.
However, a useful reference is provided for the interested reader for each
tool and technique.
2.1 Confidence Interval Estimation
Condence interval estimation is a technique to estimate a population
parameter (such as population proportion) using sample data. The estimate
is calcul ...