Title: Chapter 19 Introduction
Course: Canvas Practice Course

KEY CONCEPTS

Process capability (C_p) reveals whether a process (people, materials, machines and methods) can meet product specifications and how effectively it can meet those specifications. It measures the amount of statistical control in a process. It defines the relationship between the fluctuations inherent in a process and the specification or tolerance limits set by eternal customers. The higher the C_p the smaller the risk of a measured value falling outside the specification. With process capability we make a connection between the statistical control we have set for the unit and the specifications of the product.

A process capability study uses a formula to generate a numerical value that is directly related to a process’s capability to make specification product. The more that number is greater than 1.0 the greater the capability of a process to make on-spec product. A process capability index is given only for processes in statistical control.