Key Points
- Performed continuously during work execution, not just before starting.
- Relies on the situational awareness and experience of workers on site.
- Essential in rapidly changing environments such as construction or shutdowns.
- Complements pre-planned risk assessments like JSA and PWRA.
Definition
Dynamic risk assessment refers to continuous evaluation of risks during the execution of work as conditions change. Unlike pre-planned assessments, it is performed in real time by workers on site. It is critical in environments where conditions evolve rapidly. In practice, it supports situational awareness and safe decision-making during execution.
Related Terms
Job Safety Analysis (JSA)
A Job Safety Analysis is a structured process used to break down a task into individual steps and identify hazards associated with each step. For every identified risk, appropriate control measures are defined to reduce or eliminate the hazard. JSA is typically prepared before work begins and is often linked directly to the permit. In practice, it ensures that work is systematically thought through rather than executed based on assumptions.
Last Minute Risk Assessment (LMRA)
LMRA is a final safety check performed immediately before starting work. It ensures that nothing has changed since the original assessment. It is often performed by the work team on site.
Point of Work Risk Assessment (PWRA)
PWRA is a risk assessment performed at the exact location where work will take place just before starting. It verifies that planned controls are still valid in the actual environment. It acts as a final validation between planning and execution.
Residual Risk
Residual risk is the level of risk that remains after all control measures have been implemented. It cannot be fully eliminated but must be reduced to an acceptable level. Understanding residual risk is critical for decision-making.
More in Risk & Safety
Simultaneous Operations (SIMOPS)
SIMOPS refers to multiple work activities taking place at the same time in the same area. These activities may interact and create additional risks. Proper coordination is essential to avoid conflicts.
Co-activity
Co-activity describes different teams or contractors working in the same area at the same time. It requires coordination to avoid interference and safety risks. It is closely related to SIMOPS.
Hazardous Energy
Hazardous energy includes any form of energy that can cause harm if released unexpectedly. This includes electrical, mechanical, hydraulic, and thermal energy. Proper control is essential before work.
Gas Testing
Gas testing involves measuring the presence of hazardous gases in the environment before and during work. It ensures that conditions are safe for workers. It is especially critical in confined spaces.
Frequently Asked Questions
How does dynamic risk assessment differ from a JSA?
A JSA is a structured, pre-work assessment that documents hazards step by step. Dynamic risk assessment is informal and continuous, responding to real-time changes during work execution.
Who performs a dynamic risk assessment?
Every worker on site is expected to continuously assess risks as conditions change. It is a shared responsibility, not limited to supervisors or safety officers.
Can dynamic risk assessment replace a formal risk assessment?
No. It supplements formal assessments like JSA and PWRA but does not replace the structured documentation and controls they provide.
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Pirkka Paronen
CEO, Gate Apps
CEO of Gate Apps, expert in digital permit-to-work and HSEQ software.
