Definition · Plain-language
ISO 9000
ISO 9000 is the family of quality-management standards and, specifically, the standard that sets out the fundamentals and vocabulary of quality management.
The step most authors miss
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Family versus standard
The term ISO 9000 carries two senses. As a family, it groups the quality-management standards — most importantly ISO 9001 (requirements) and ISO 9004 (guidance on sustained success) — together with ISO 9000 itself. As a single standard, ISO 9000:2015 is the document titled Quality management systems — Fundamentals and vocabulary. It establishes the concepts and defined terms that the other standards rely on, so that words such as conformity, nonconformity, process and continual improvement carry precise, shared meanings across every organisation using the family.
The seven quality-management principles
ISO 9000:2015 sets out seven quality-management principles that inform ISO 9001: customer focus, leadership, engagement of people, the process approach, improvement, evidence-based decision-making, and relationship management. These principles are not auditable clauses in themselves but the philosophy behind the requirements. They explain why ISO 9001 emphasises understanding customer needs, managing work as interconnected processes, and improving continually. Reading ISO 9000 first helps an organisation grasp the intent behind ISO 9001 rather than treating certification as a box-ticking exercise.
Why ISO 9000 is not certifiable
Because ISO 9000 supplies fundamentals and vocabulary rather than requirements, there is nothing in it to audit conformity against, so organisations cannot be certified to ISO 9000. Certification is always against ISO 9001, the requirements standard. ISO 9000 still matters operationally: auditors, consultants and internal quality staff use its definitions to interpret ISO 9001 consistently, and disputes over what a term means are resolved by reference to it. In short, ISO 9000 is the dictionary and rationale; ISO 9001 is the rulebook you are measured against.
Key facts
At a glance
- Definition: the QMS standards family and the fundamentals-and-vocabulary standard
- Current standard: ISO 9000:2015
- Certifiable: no — it defines concepts and terms, not requirements
- Contains: seven quality-management principles underpinning ISO 9001
- Family members: ISO 9000, ISO 9001 (requirements), ISO 9004 (guidance)
- Purpose: shared vocabulary and rationale for the QMS family
Common misconceptions
What people often get wrong
Often heard: You can get certified to ISO 9000.
Actually: You cannot. ISO 9000 defines fundamentals and vocabulary, with no requirements to audit against. Certification is granted against ISO 9001, the requirements standard. ISO 9000 supports interpretation of ISO 9001 but is not itself certifiable.
Often heard: ISO 9000 and ISO 9001 are just two names for the same standard.
Actually: They are different documents. ISO 9000 sets out concepts, principles and vocabulary; ISO 9001 specifies the certifiable requirements for a quality management system. ISO 9000 is the foundation that ISO 9001 builds on.
Often heard: ISO 9000 is only relevant to manufacturers.
Actually: The ISO 9000 family is sector-agnostic. Its principles and vocabulary apply to services, healthcare, education, software and the public sector — any organisation operating a quality management system, not just factories.
Going deeper
