Process Capability Cpk / Ppk

Six Sigma & Statistical Quality · Statistical Process Control · Below is the published content, sorted by rating, views and update time

Articles

Total 7 articles, 8 per page

Process Capability Cpk and Ppk — Don't Confuse the Two Indices

Abstract : During an audit, Ppk is asked for, but the report only contains Cpk; Cpk is 1.67, yet frequent out of spec co…

★★★☆☆ · 👁 488 · 6/22/2026

Detailed Steps for Calculating Cpk — A Practical Guide from Data Collection to Capability Assessment

1. What Does Cpk Address? The process capability index Cpk Process Capability Index is one of the most commonly used sta…

★★★☆☆ · 👁 227 · 7/28/2026

Cpk Only 0.82, Customer Issues an Ultimatum? — A Case Study of Process Capability Improvement in an Automotive Parts Company

1. Introduction: An Audit Report Reveals the True Picture An automotive parts company specializes in spline shafts, with…

★★★☆☆ · 👁 159 · 8/17/2026

QE Skill Enhancement (10) | What's the Difference Between Cp/Cpk and Pp/Ppk: Correct Interpretation of Short-term and Long-term Capability

A precision machining company supplies drive shafts to a new energy client. During the client's audit, a process capabil…

★★★☆☆ · 👁 107 · 9/20/2026

Advancing QE Skills (12) | Cmk and Equipment Capability Acceptance: Quantitative Thresholds Before New Equipment Goes Online

1. Introduction: A "Qualified" Machine Fails After Three Months of Mass Production A manufacturing company recently purc…

★★★☆☆ · 👁 100 · 9/22/2026

Advancing QE Skills (11) | Capability Analysis for Non-Normal Data: Transformation, Box-Cox, and Non-Parametric Methods

A mechanical processing company submitted an initial process capability report to a client, focusing on the roundness of…

★★★☆☆ · 👁 96 · 9/21/2026

Advancing QE Capabilities (15) | When Capability is Insufficient, Should You Change the Process or the Specification: A Dialogue Between Capability and Specification

1. A Meeting Held Three Times Without a Conclusion A car parts company's bracket hole size, after six months of mass pro…

★★★☆☆ · 👁 76 · 9/25/2026

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