These three standards are the most requested certifications in construction, manufacturing, oil & gas and many supply chains. They cover different risks but share the same structure.
The short answer
- ISO 9001 for the quality and consistency of what you deliver.
- ISO 14001 if your activities affect the environment.
- ISO 45001 if your people face health and safety risks.
Side by side
| ISO 9001 | ISO 14001 | ISO 45001 | |
|---|---|---|---|
| Manages | Quality and customer satisfaction | Environmental aspects and compliance | Occupational health and safety risks |
| Key planning tool | Risks and objectives | Aspects and impacts register | Hazard identification and risk assessment |
| Typical buyers asking | All sectors | Manufacturing, construction, energy | Construction, oil & gas, manufacturing, logistics |
What they have in common
All three follow the same clause structure (4 to 10), so you can share policy, risk approach, document control, internal audit, management review and corrective action.
Certifying them together
An integrated audit covers the shared requirements once, usually reducing total audit days and disruption. See Integrated Management System certification.