BHP - Driving safety forward

Incorporating the types of controls

“ Effective control strategies combine multiple control types across the incident timeline.

The goal is not just to react but to prevent, interrupt, and protect, all within a system that actually works on site.”

Let’s take a look at how the types of controls act on the timeline.

Incident Sequence (Point of Risk)

Pre-event

Stable

Metastable Unstable Damage Post-event

Interrupt Control Control interrupts sequence by itself.

Assisted Interrupt Control Control interrupts sequence with assisting action from person.

Damage Reduction Control

Control acts by reducing damaging energy exchange with person.

Control acts in Post-Event phase by reducing the time for medical response.

Human Action Interrupt Control Control interrupts sequence when human acts only based on skills, knowledge and perception.

Upstream, away from point of risk and event sequence

Support Factor A system, process or activity, away from an event sequence, that supports or enables Controls to be available and effective when needed. ALL Support Factors are in the Pre-event Phase — but are NOT controls , in their own right.

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