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📄 665 articles in total 📅 Continuously updated 🔥 Pinned first, then sorted by rating, views and publish date
Six Sigma & Statistical Quality · Statistical Process Control · Process Capability Cpk / Ppk

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…

Business & Enterprise Operations · Cost & Resource Management · Cost of Quality (COQ)

QM Management Depth (10) | COPQ: How to Calculate, Who to Present It To, and What Level of Granularity to Use

A certain electronics manufacturing company, with annual revenue of 860 million yuan, operates three product lines—indus…

Quality Management System · Documentation, Records & Knowledge · Documented Information Structure

ISO9001 System Document Package (42) | Internal Audit Implementation Work Instruction (Internal Auditor Manual)

Document Number : WI QA 42 Document Level : Level 3 Document Work Instruction/Internal Auditor Manual Corresponding Clau…

Six Sigma & Statistical Quality · Experimentation & Robustness · DOE Basics & Advanced

Random Trial Sequencing Can Lead to False Significant Factors? —— Five Steps for Randomization, Blocking, and Center Points in DOE

1. An Experiment That Reached the Opposite Conclusion A die casting company conducted a two level, three factor experime…

Continuous Improvement & Problem Solving · Structured Problem Solving · 8D & Recurrence Prevention

"Operator Negligence" Again? —— A Five-Step Method for Identifying Human Factors and Upgrading Systems

1. Three 8D Reports, the Same "Root Cause" A certain electronic connector company conducted 14 8D reports in the second …

Quality Management System · System Framework & Standards · ISO 9001 Core Clauses Interpretation

In-depth Interpretation of ISO9001 Clauses (21) | 8.5.1 Control of Production and Service Provision + 8.5.2 Identification and Traceability

1. Key Points of the Clauses 8.5.1 Control of Production and Service Provision : The organization shall carry out produc…

Six Sigma & Statistical Quality · Measurement & Inspection · MSA & Traceability

Advancing QE Skills (9) | Measurement System Analysis for Destructive Testing: Nested Design and Alternatives

A modified plastic company supplies interior components to an original equipment manufacturer OEM . Tensile strength is …

Business & Enterprise Operations · Cost & Resource Management · Cost of Quality (COQ)

QM Management Depth (9) | Four-Class Calculation Method for Quality Costs: Prevention, Appraisal, Internal Failure, External Failure

A certain automotive parts company, with annual revenue of 1.2 billion yuan, supplies two original equipment manufacture…

Quality Management System · Documentation, Records & Knowledge · Documented Information Structure

ISO9001 System Document Package (41) | Customer Complaint Handling Work Instruction

Document Number : WI QA 41 Document Level : Level 3 Document Work Instruction Corresponding Clause : ISO 9001:2015 8.2.1…

Six Sigma & Statistical Quality · Statistical Process Control · Control Chart Selection & Out-of-Control Analysis

Control Limits Set Once and Never Changed? — A Five-Step Method for Establishing, Inspecting, and Updating Control Limits

During a process audit at an automotive parts company, an auditor pointed to the X̄–R control chart hanging on the wall …

Quality Management System · Documentation, Records & Knowledge · Documented Information Structure

Inaccurate Record Filling, Don't Blame the Employees — Five Steps for Designing Quality Record Forms

1. Three Records from the Same Process, Three Different Filling Methods A metal stamping company was audited by a custom…

Quality Management System · System Framework & Standards · ISO 9001 Core Clauses Interpretation

In-depth Interpretation of ISO9001 Clauses (20) | 8.4 Control of Externally Provided Processes, Products, and Services: Comprehensive Supplier Management

1. Key Points of the Clause Clause 8.4 consists of three sub sections, the internal logic being "set criteria, set contr…