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Chapter 7 i m p r o v e S tag e 169
• Statistical process control (SPC) charts, including C, Np, P, U, Individual- X,
X- bar, and EWMA charts and the process capability index help to verify the
effects of the improvement.
• Goodness- of- fit tests help to verify the statistical distributions assumed in
the various statistical tools.
In addition, the consensus- building tools noted at the end of Chapter 4 are also
applied as needed.
