Process Capability Index (Cp) Guide

This document explains the process capability index (Cp) as a statistical measure of a process's ability to produce output within specification limits, emphasizing that a higher Cp indicates lower defect rates and greater process stability. It covers how Cp is calculated using tolerance width and standard deviation, provides standard reference values (e.g., Cp=1.33 or 1.50), and discusses the need for process improvements when the index falls below standard.