Understanding ISO 12100 Inherently Safe Design Measures

Frequently Asked Questions

What does ISO 12100 Section 6.2 mean by inherently safe design?

It means eliminating hazards or reducing risk through the machine’s design before relying on guards, interlocks, procedures, training, or PPE. The basic idea is to ask whether the hazard can be removed or reduced by design first.

What are examples of inherently safe design measures on industrial equipment?

Examples in the post include relocating adjustment points outside danger zones, reducing speed, force, temperature, pressure, or stored energy, and designing out sharp edges, crush points, and unnecessary protrusions. It can also include arranging the machine so cleaning, inspection, adjustment, and maintenance happen from safer locations.

When should we apply inherently safe design during a machine project?

The post says to apply it early during equipment purchase, modification, and pre-startup planning. It also recommends building these questions into capital planning, change management, and vendor discussions.

Why is inherently safe design stronger than guards or procedures?

Because it reduces dependence on human action, proper use, maintenance, and supervision. The post explains that designing the hazard down is usually a stronger and more reliable control than managing the same exposure with rules or warnings.

What machine tasks should we review besides normal operation?

The post says not to stop at normal production tasks. Teams should also review setup, jam clearing, cleaning, troubleshooting, sanitation, and maintenance because those activities often reveal the biggest design-related exposures.