ISO 9001 and Quality Auditing: What CQE Candidates Need to Know
Quality systems and auditing form a full section of the CQE Body of Knowledge. Here is what ISO 9001 requires and how audits actually work.
John Lee·July 26, 2026·8 min
ASQ CQE Resource Library
Quality Engineering Certification Insights
Practical, engineer-focused guides to earning and maintaining the ASQ Certified Quality Engineer (CQE) credential—written by John Lee, who has passed every ASQ certification. New posts are published throughout the season.
Measurement Systems Analysis and Gage R&R for the CQE
If you cannot trust your measurements, you cannot trust any decision built on them. Here is how MSA and Gage R&R keep your data honest.
John Lee·July 19, 2026·8 min
Root Cause Analysis and the 7 Quality Control Tools for the CQE
Solving problems permanently means finding the root cause, not the symptom. Here are the classic tools every CQE relies on to get there.
John Lee·July 12, 2026·9 min
Design of Experiments (DOE) Basics for the ASQ CQE
DOE lets you learn the most about a process from the fewest experiments. Here are the core concepts every CQE candidate needs to understand.
John Lee·July 5, 2026·9 min
FMEA Step by Step: A CQE Guide to Failure Mode and Effects Analysis
FMEA is the quality engineer’s primary tool for anticipating failures before they happen. Here is how to build one and how it is tested on the CQE.
John Lee·June 28, 2026·9 min
Acceptance Sampling and OC Curves: A CQE Study Guide
Acceptance sampling decides whether to accept a lot based on a sample. Here is how sampling plans work and how to read an OC curve for the CQE exam.
John Lee·June 21, 2026·9 min
Process Capability: Cp, Cpk, Pp, and Ppk Explained for the CQE
Capability indices tell you whether a stable process can actually meet specifications. Here is what Cp, Cpk, Pp, and Ppk really measure and how they differ.
John Lee·June 14, 2026·9 min
A Practical Guide to SPC Control Charts for the ASQ CQE
Control charts are the heart of statistical process control and a major CQE exam topic. Here is how to choose the right chart and read it correctly.
John Lee·June 7, 2026·10 min
Cost of Quality Explained: The Framework Every CQE Candidate Must Master
Cost of Quality is one of the most testable and most misunderstood concepts on the CQE exam. Here is how the four categories fit together and how to reason about them.
John Lee·May 31, 2026·9 min
Ready to Become a Certified Quality Engineer?
Join thousands of professionals who have passed their ASQ CQE exam with our proven preparation methodology—94% first-time pass rate, instructor-led courses, and roughly 1,000 practice questions.