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Explore concepts, methods, standards and quality operations through clear guides.
- GlossaryQuality Management System (QMS)A quality management system is the set of policies, processes, responsibilities and records an organisation uses to plan, assure, control and improve the quality of its products and services. The most widely used reference framework is ISO 9001.
- GlossaryQuality Lifecycle Management (QLM)QLM (Quality Lifecycle Management) is the approach of managing quality processes not as separate records but as one lifecycle, from planning to event, from event to verified closure and learning.
- GlossaryISO 9001ISO 9001 is the international standard that sets out requirements for a quality management system. It is industry-independent and can be used for certification; industry standards such as IATF 16949 and AS9100 build on it.
- GlossaryNonconformity (NCR)A nonconformity is the non-fulfilment of a requirement: a product, process or system does not meet what is expected. A nonconformance report (NCR) is the document in which it is recorded.
- GlossaryCorrectionA correction is action taken to eliminate a detected nonconformity, such as reworking a faulty part or fixing a record. It does not remove the cause of the nonconformity.
- GlossaryCorrective ActionCorrective action is action taken to eliminate the cause of a nonconformity and prevent it from recurring. An action defined without understanding the root cause is often only a correction.
- GlossaryPreventive ActionPreventive action is action taken to eliminate the cause of a potential nonconformity that has not yet occurred. In the current edition of ISO 9001 it is addressed through risk-based thinking rather than a separate clause.
- GlossaryCAPACAPA (Corrective and Preventive Action) is the systematic process of finding and eliminating the causes of nonconformities and potential nonconformities. It is an established term especially in regulated industries such as medical devices and pharmaceuticals.
- Glossary8D8D is a method for solving a problem as a team through a structured, eight-step approach. It became widespread in automotive, and customers often require an 8D report from suppliers.
- GlossaryContainmentContainment is the immediate action taken to protect the customer and downstream processes from nonconforming product until a permanent fix is in place: sorting, quarantine, 100% inspection or stopping shipments.
- GlossaryRoot Cause Analysis (RCA)Root cause analysis (RCA) is the umbrella term for methods that look for the underlying cause of a problem rather than its visible symptom. The right root cause is a precondition for a corrective action that actually works.
- Glossary5 Why5 Why is a simple root-cause technique that deepens the cause of a problem by asking "why?" repeatedly. The number five is not a rule but a reminder not to stop at the surface.
- GlossaryIshikawa DiagramThe Ishikawa (fishbone or cause-and-effect) diagram is a tool that visually organises the possible causes of a problem under categories. Categories commonly used in manufacturing are known as the 6Ms.
- GlossaryOccurrence and Escape Root CauseA problem usually has two separate root causes: the occurrence cause (why did the defect happen?) and the escape cause (why did it reach the customer without being caught?). Many practices add a systemic cause as well.
- GlossaryEffectiveness VerificationEffectiveness verification is proving, against a criterion and period defined in advance, that an implemented corrective action has actually eliminated the problem. Completing the action does not mean it was effective.
- GlossaryFMEAFMEA is a method for systematically analysing how a design (DFMEA) or process (PFMEA) can fail, the effects and causes of those failures, and reducing the risk in advance. In automotive the current reference is the AIAG & VDA FMEA Handbook.
- GlossaryAPQPAPQP (Advanced Product Quality Planning) is a framework for developing a new product or change through a phased, gate-controlled plan so that it meets customer requirements.
- GlossaryPPAPPPAP (Production Part Approval Process) is the approval process in which a supplier proves that its series production process can consistently meet customer requirements. The evidence is submitted as a file according to the submission level the customer requires.
- GlossarySPCSPC monitors a process with statistical methods, especially control charts, to separate common-cause variation from special causes and to intervene in time.
- GlossaryMSAMSA is the set of studies that assess whether the data produced by a measurement system (gauge, method, operator and environment) is reliable enough to base decisions on. Unreliable measurement rejects good product or passes bad.
- GlossaryControl PlanA control plan is the document that defines how product and process characteristics are controlled: what is measured, by which method, how often, and what to do if there is a deviation. It can be prepared for prototype, pre-launch and production phases.
- GlossarySpecial CharacteristicA special characteristic is a product or process characteristic that needs special control because it can affect safety, regulatory compliance, fit or function. It is designated by the customer or the organisation and usually marked with customer-specific symbols.
- GlossaryAudit FindingAn audit finding is the result of comparing the audit evidence collected against the audit criteria. It can be classified as a nonconformity (usually major/minor), an observation or an opportunity for improvement.
- GlossarySCARA SCAR (Supplier Corrective Action Request) asks a supplier for root cause analysis and corrective action on a supplier-caused nonconformity. The supplier’s response is often expected in 8D format.
- GlossarySLAIn quality operations an SLA is a time target defining how quickly work or a step must be completed: first response to a complaint, containment, the 8D report. Targets often come from customer requirements.
- GlossaryEscalationEscalation is moving an issue to the right decision level by predefined rules when work misses its time target or risk rises. The aim is not to find someone to blame but to make the decision in time.
- GlossaryIATF 16949IATF 16949 is the quality management system standard specific to the automotive industry. It is applied together with ISO 9001 and complemented by OEM customer-specific requirements; certification is performed by certification bodies recognised by the IATF.
- GlossaryAS9100AS9100 (the IAQG 9100 series) is the standard that sets quality management system requirements for aviation, space and defence organisations. It builds on ISO 9001 with industry-specific requirements; the widely used edition is AS9100D.
- GlossaryISO 10002ISO 10002 is the standard that gives guidance for planning, designing, operating, maintaining and improving the complaints-handling process within an organisation. It is a guideline, not a requirements standard, and can be used as one of the processes of an overall quality management system.
- GlossaryVDA 6.3VDA 6.3 is the process audit method published by the German automotive industry association VDA. It assesses the product creation process by scoring a question catalogue; many OEMs require it from their suppliers.
- GlossaryCustomer-Specific Requirements (CSR)Customer-specific requirements (CSR) are the automotive OEMs’ own requirements that they expect from suppliers in addition to IATF 16949. They can cover topics such as response times, problem-solving format, special characteristic symbols and approval processes.
- GlossaryEYDEPEYDEP is a programme in Türkiye aimed at assessing and developing the capabilities and capacity of organisations in the defence industry ecosystem. It is not a quality standard but an assessment and development programme; refer to the official EYDEP source for its current process and scope.
- GuideWhat is QLM? How does it differ from a QMS?What Quality Lifecycle Management is, which gap it names, and where it departs from the expectations of a classic quality management system.
- GuideThe difference between a quality record and a quality operationA record system answers “what happened?”; an operation answers “who does what now, and where is the risk?”. Where that difference becomes visible.
- GuideWhy an 8D form is not, on its own, a working problem-solving systemD1–D8 is a methodology; the form is its output. Where the methodology does not become tasks, evidence, gates and decisions, 8D is reduced to a report.
- ToolQuality Operations Stress Test12 questions, four dimensions. See your strengths, your most critical break points and a single next step. Answers never leave your browser.
- ToolQuality Operations Maturity ModelAssess the four dimensions separately; see your maturity profile and your biggest gap. About 2 minutes.
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Explore by topic
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Quality Fundamentals
The basic language of quality management, nonconformity and corrective action.
QMSQLMISO 9001NCRCorrectionCorrective ActionPreventive Action
Problem Solving
8D, CAPA, root cause analysis and containment.
CAPA8DContainmentRCA5 WhyIshikawa DiagramOccurrence and Escape Root CauseEffectiveness Verification
Product and Process Quality
FMEA, APQP, PPAP, Control Plan, SPC and MSA.
Audit and Follow-up
Audit findings, supplier actions, deadlines and escalation.
Standards and Requirements
IATF 16949, AS9100, ISO 10002, VDA 6.3, CSR and EYDEP.
Starter guides
Three pieces that show quality operations differently.
- “We already have a quality system. What does QLM change?”What is QLM? How does it differ from a QMS?What Quality Lifecycle Management is, which gap it names, and where it departs from the expectations of a classic quality management system.~9 min · Read →
- “We digitised. So why is everyone still calling each other?”The difference between a quality record and a quality operationA record system answers “what happened?”; an operation answers “who does what now, and where is the risk?”. Where that difference becomes visible.~11 min · Read →
- “We have an 8D procedure. Why does the same problem recur?”Why an 8D form is not, on its own, a working problem-solving systemD1–D8 is a methodology; the form is its output. Where the methodology does not become tasks, evidence, gates and decisions, 8D is reduced to a report.~12 min · Read →
Learning paths
Learn step by step.
Each path opens concepts that build on each other, in the right order.
6 steps
Learn customer complaint management
The core concepts from receiving a complaint to verified closure.
11 steps
Automotive quality system
The building blocks of an automotive supplier’s quality world.
7 steps
Quality in aerospace and defence
Nonconformity, action, audit and supplier follow-up in an AS9100 environment.
Standards and requirements
Not all of them are standards. The difference matters.
A standard, a guideline, an audit method, a customer requirement and an assessment programme are different things. A short explanation and the official source for each:
Standard
IATF 16949
IATF 16949 is the quality management system standard specific to the automotive industry.
Standard
AS9100
AS9100 (the IAQG 9100 series) is the standard that sets quality management system requirements for aviation, space and defence organisations.
Standard
ISO 9001
ISO 9001 is the international standard that sets out requirements for a quality management system.
Guideline
ISO 10002
ISO 10002 is the standard that gives guidance for planning, designing, operating, maintaining and improving the complaints-handling process within an organisation.
Audit method
VDA 6.3
VDA 6.3 is the process audit method published by the German automotive industry association VDA.
Customer requirement
CSR
Customer-specific requirements (CSR) are the automotive OEMs’ own requirements that they expect from suppliers in addition to IATF 16949.
Assessment programme
EYDEP
EYDEP is a programme in Türkiye aimed at assessing and developing the capabilities and capacity of organisations in the defence industry ecosystem.
Tools
Measure instead of reading.
Quality Operations Stress Test
12 questions, four dimensions. See your strengths, your most critical break points and a single next step. Answers never leave your browser.
Start the test →Quality Operations Maturity Model
Assess the four dimensions separately; see your maturity profile and your biggest gap. About 2 minutes.
Start the assessment →
Quality Glossary
Understand the terms in 30 seconds.
For each term: a short answer, how it works, what it is often confused with and common mistakes.
Full glossary →Our editorial standard
We do not publish unsourced claims.
- We do not publish industry statistics of unclear origin or improvement percentages without a measurement method.
- We do not copy standards; we explain them in our own words and link to the official source.
- Every piece carries an update date; the product appears only briefly, at the end.
Measure your quality operation.
See the strong and fragile points of your operation in a few minutes with the 12-question stress test.