Knowledge base: standard-independent guides on certification
Many questions about certification do not concern one specific standard. How do you choose a certification body? How does the initial audit work? What does an ISO certificate actually cost? These answers apply to ISO 9001, ISO 27001 and most other standards at the same time.
That is why we bundle them here. The knowledge base explains the shared basis, so you understand the standard-specific pages better. All certification bodies must be accredited by the Raad voor Accreditatie (RvA, Dutch Accreditation Council) , and you buy the official standards from NEN . From these guides, we always refer you to the right standard.
The guides
Decision table by goal and sector, with links to all 14 standards.
Which ISO certification do I need?Why all ISO standards follow the same structure and what that gives you.
High Level Structure (HLS)What a certification body (CI) is, how to check accreditation and what to compare.
Choosing a certification bodyWhat the RvA is, and the difference between certification and accreditation.
Accreditation explainedChecking the RvA register, recognising the accreditation mark, red flags.
Checking a certificateStage 1 and stage 2, what the auditor does and the possible outcomes.
The initial auditThe three-year cycle, surveillance audits and what happens on expiry.
Surveillance audit and recertificationThe difference, examples, deadlines and a template for your response.
Major and minor nonconformityAnnual programme, carrying out the audit, reporting and following up nonconformities.
Planning and carrying out an internal auditPlan for one audit: scope, criteria, timings and the evidence you are looking for.
Drawing up an audit planStructure, template, and a good versus a poor finding.
Writing an audit reportInternal versus lead auditor, what you need to be able to do and personal certification.
Becoming an ISO auditorMandatory input and output, agenda example and frequency.
Management reviewWhen Excel is enough and when you need dedicated tools.
ISO software for your management systemCosts per standard, the three cost items and how to reduce audit costs.
ISO certification costsMethods that come up in every standard
You use these methods in every management system: to assess risks, find the causes of nonconformities and improve. For each method, you can read where a standard or auditor asks for it, with a completed example you can adapt.
Plan-do-check-act linked to the chapters of the HLS.
PDCA cycleScales for likelihood and impact, a 5x5 matrix and a completed register.
Creating a risk matrixThe guideline behind every risk process, and how to use it.
ISO 31000 risk managementCauses, consequences and barriers around one unwanted event.
Bowtie analysisScoring failure modes on severity, occurrence and detection, with a PFMEA example.
FMEAFinding the cause of a nonconformity, with a template.
Root cause analysis and 5 whysOrganising causes using the 6Ms and checking them with facts.
Ishikawa diagram (fishbone)The 8 disciplines for complaints, with a completed example.
8D reportCorrective and preventive actions, with a register template.
CAPA and CAPA registerTemplate and worked example of a quotation process.
Writing a process descriptionTemplate, example and how to learn from complaints.
Keeping a complaints registerPopular topics per standard
Want to go deeper into the content of a specific standard? Start with these popular pages.
Sources
- Raad voor Accreditatie (RvA, Dutch Accreditation Council) : checks whether certification bodies do their work properly
- NEN : the Dutch standardisation institute that publishes the standards
- International Organization for Standardization (ISO) : the international organisation behind the ISO standards