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This video will explore the "Difference Between Cpk and Ppk: SPC".

Walter Shewhart and W Edward Deming have done tremendous work to understand the variation in the process and its causes through statistical studies (mean, range, UCL, LCL, Cp, Cpk, Pp, Ppk, p, np, c, u). Understanding these variations is important to improving quality, reducing costs, and increasing productivity (QCD).

The purpose of the SPC study is to understand the process variation. Both Ppk and Cpk study have their unique purpose and interpretation. Ppk study is relevant during new development and Cpk study is primarily used during mass production. While the Ppk study considers the variation in all the samples and includes both common and special causes of variation, the Cpk study considers the variation within the subgroup. It considers only the common cause of variation.
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