Understanding Machinery Safety: ISO 12100 Risk Assessment and Risk Reduction
Use ISO 12100 to assess machine hazards across the full lifecycle, prioritize risk reduction, and strengthen guarding and lockout/tagout reviews.
Published: June 21, 2026 · By SafetyNet Editorial Team
Updated: June 27, 2026
Category: Industrial Safety
Frequently Asked Questions
What does ISO 12100 cover for machinery safety?
ISO 12100 provides a structured method for machinery risk assessment and risk reduction. It helps teams identify hazards, estimate and evaluate risk, and reduce risk across the machine’s full lifecycle.
Does ISO 12100 replace OSHA machine guarding or lockout/tagout requirements?
No. The post says ISO 12100 is not an OSHA standard and does not replace legal requirements. It can be used alongside OSHA requirements, including machine guarding and lockout/tagout programs.
What tasks should be included in a machine risk assessment?
The assessment should cover the full machine lifecycle, not just normal production. That includes installation, setup, operation, cleaning, jam clearing, troubleshooting, preventive maintenance, repair, and decommissioning.
Should we start a machine risk assessment by choosing guards?
No. The post says teams should start by defining machine limits, intended use, foreseeable misuse, tasks, users, and hazards before selecting controls. Guards and other safeguards come after the hazards are clearly identified.
When should a machine risk assessment be reviewed or updated?
The post recommends reassessing risk when conditions change, such as after equipment modifications, incidents, or recurring near misses. Documentation is also especially valuable when a machine is moved or involved in an incident investigation.