Cpk and cpk difference

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Cpk and cpk are statistical measures used to assess the capability of a process to meet specifications.

Cpk measures how well a process can produce output within specification limits.
Cpk takes into account both the mean and the variation of the process.
Cpk is calculated as the minimum of (USL - mean) / (3 * standard deviation) and (mean - LSL) / (3 * standard deviation).
Cpk should be at least 1.33 to indicate a capable process.
Cpk is used for non-centered processes.
Cp measures the potential capability of a process to meet specifications.
Cp only takes into account the variation of the process.
Cp is calculated as (USL - LSL) / (6 * standard deviation).
Cp should be at least 1.0 to indicate a capable process.
Cp is used for centered processes.

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