THE COPLAIN BLOG
ISO 9001, FDA 21 CFR 820, AS9100, and IATF 16949 compliance guides for manufacturing quality engineers.
20 articles
Most audit failures aren't about process gaps. They're about documentation that doesn't reflect reality. Here's the checklist we wish existed before our first Rev D audit.
Warning letters. 483 observations. Consent decrees. Most FDA enforcement actions have one thing in common: inadequate documentation. Here's what the agency actually looks for.
The 2015 revision eliminated the quality manual requirement and six mandatory procedures. What it added is more demanding. Here's what actually changed — and what your registrar looks for during surveillance.
A clause-by-clause internal audit checklist covering all 10 ISO 9001 sections, the 20 most common findings, and how to write audit observations that actually drive improvement rather than generate paperwork.
AS9100 Rev D adds over 100 aerospace-specific requirements on top of ISO 9001. This is a practical comparison of what changes, what is entirely new, and what trips up manufacturers making the transition.
A nonconformance report that describes symptoms without identifying root cause is just a paperwork exercise. Here is how to write an NCR that actually prevents the next failure.
A control plan that exists for compliance purposes and a control plan that actually controls your process look nothing alike. Here is how to build one that does both — and survives an IATF 16949 audit.
Most FMEAs are written to satisfy a customer requirement, not to prevent failures. This guide covers how to run an FMEA that actually identifies your highest-risk failure modes — and what changed in the AIAG-VDA 2019 format.
The 8D process is the automotive industry standard for corrective action — and it is routinely done badly. Here is a discipline-by-discipline guide with real examples and the mistakes that get 8Ds rejected.
Starting a QMS from scratch is a 12-18 month project if you approach it correctly, and an endless source of rework if you don't. This guide covers what to do first, what to build when, and the mistakes that derail most implementations.
Most audit failures are not process failures — they are preparation failures. A 30-day preparation program, applied systematically, eliminates the majority of findings before the auditor arrives.
FAI is one of the most frequently misunderstood requirements in aerospace and automotive quality. Most rejections trace to the same five mistakes — here is how to avoid all of them.
PPAP rejections cost automotive suppliers time, money, and customer confidence. Most rejections are avoidable — they trace to misunderstood requirements and incomplete packages.
SPC is the difference between finding defects after they happen and preventing them before they do. Most manufacturers have the data — they just are not using it correctly.
When a supplier ships bad parts, the defect shows up on your line, in your customer's plant, or in the field. Supplier quality failures are your problem — here is how to prevent them.
The DHF is the documentary proof that your device was designed correctly. An incomplete DHF is both a regulatory citation and a product liability exposure. Here is how to build one that holds up.
Every measurement decision in your facility rests on the assumption that your gauges are accurate. Calibration management is what keeps that assumption valid.
Most CAPAs close on paper and reopen on the floor. The difference between a CAPA that sticks and one that generates a repeat finding is almost always in the root cause analysis.
AS9100 work instructions must go beyond ISO 9001 basics — key characteristics, critical items, and customer flow-down requirements all change what goes in each step. Here is how to write instructions that satisfy both the standard and the aerospace prime on your purchase order.
IATF 16949 specifies exactly what must be in a control plan — and the AIAG format is what your registrar and automotive customers expect. Here is a step-by-step guide to creating a control plan that survives both internal audit and customer review.