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Compliance & EHS Insights

Comprehensive guides on EHS compliance, OSHA regulations, EPA requirements, supply chain quality, supplier auditing, and regulatory frameworks for manufacturers. From CFATS to ISO 14001 and ISO 45001 integration.

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What Happens During an ISO Audit? A Step-by-Step Guide From an Active 3rd Party Auditor
Compliance & EHS15 min readExceleor Team

What Happens During an ISO Audit? A Step-by-Step Guide From an Active 3rd Party Auditor

Most manufacturers dread ISO audits because they do not know what to expect. As an active 3rd party auditor who conducts certification, surveillance, and recertification audits across 9+ standards, we pull back the curtain on exactly what happens from the moment the auditor walks in the door. We cover the complete audit lifecycle: Stage 1 documentation review (what auditors look for in your quality manual, procedures, and records), Stage 2 on-site assessment (how auditors select processes to audit, what questions they ask operators, how they evaluate competence), the closing meeting (how findings are categorized as major nonconformities, minor nonconformities, or opportunities for improvement), and the post-audit corrective action process. We share the 10 most common audit findings we write across all standards, the 5 things that impress auditors most, and a practical pre-audit checklist your team can use to prepare. This is the insider perspective you cannot get from someone who has never held a clipboard on the other side of the audit table.

ISO AuditAudit ProcessISO 9001 Audit
June 5, 2026

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