KEVOS® WORKOS · Decide
Risk Rating (5 × 5 matrix)
How serious is this risk?
Rates a risk on a 5 × 5 likelihood and consequence matrix and suggests the response for its band.
Open the calculatorRuns in your browser. No account needed.
How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Likelihood | 1–5 score | Your organisation’s likelihood scale (1 rare, 5 almost certain) |
| Consequence | 1–5 score | Your organisation’s consequence scale (1 minor, 5 severe) |
Method and formulas
- Risk score = likelihood × consequence
- Low 1–6, medium 7–14, high 15–25 (adjust to your criteria)
Limitations
- Matrices compress information and can rank risks inconsistently
- Bands are defaults, not your organisation’s risk appetite
- Severe consequences need controls even at low likelihood
Typical uses
- Risk registers
- Pre-start and project risk workshops
- Prioritising controls
Who it is for
- Project and operations managers
- Safety and quality staff
- Risk owners
What you get
- LOW, MEDIUM or HIGH risk
- Score out of 25
- Banding table and response
Interpreting the result
- Use defined descriptors so different people score consistently
- Re-rate residual risk after controls
References
- AS ISO 31000:2018 Risk management — Guidelines
- Cox L. A., “What’s wrong with risk matrices?”, Risk Analysis 28(2), 2008
WORKOS tools are screening and decision-support utilities. Verify important financial, engineering, safety, legal or operational decisions using appropriate professional standards and your organisation’s approved data.
