What is Cp and Cpk how to use , why to use

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Accepted Answer

Cp and Cpk are process capability indices used to assess the ability of a process to produce within specification limits.

Cp measures how well the process can fit within the specification limits.
Cpk takes into account the process centering and measures how well the process can fit within the specification limits while also considering the process variation.
They are used to determine if a process is capable of producing products that meet customer requirements consistently.
A Cp value of 1 indicates that the process is capable, while a Cpk value of 1.33 or higher is considered acceptable.
They are important tools in quality assurance to monitor and improve processes.
Example: If a manufacturing process has a Cp of 1.2 and a Cpk of 1.1, it indicates that the process is capable but not centered within the specification limits.

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