The method
Before using the result
- Scores are prioritisation aids, not probabilities or proof of acceptable risk. Controls and residual scores need independent assessment; no automatic low/medium/high labels.
Worked examples
These original training examples illustrate the method for Certified Safety Professional (CSP). Use the matching “Load example” button above to explore a variation; example values are not equipment settings or prescribed criteria.
1. Worked example
Define ordinal likelihood and severity scales before scoring hazards. Show the proposed control and residual assessment without automatically declaring a risk acceptable.
- Maximum likelihood score on your scale
- 5
- Maximum severity score on your scale
- 5
- Describe your likelihood/severity scales
- Example ordinal scales 1–5. Define actual categories before assessment.
Supplied hazards and controls
| Hazard | Initial likelihood score | Initial severity score | Proposed control | Residual likelihood score | Residual severity score |
|---|---|---|---|---|---|
| Training example | 3 | 4 | Example additional control | 2 | 4 |
- Initial and residual score = supplied likelihood × supplied severity.
- Hazards recorded: 1
- Scale description: Example ordinal scales 1–5. Define actual categories before assessment.
A smaller score does not by itself demonstrate that a control is effective or a risk is acceptable.
2. Comparison example
Compare a different supplied condition using the same method. For Safety Conquer, the important check is that the input meaning, units and method assumptions still match the problem.
- Maximum likelihood score on your scale
- 5
- Maximum severity score on your scale
- 5
- Describe your likelihood/severity scales
- Example ordinal scales 1–5. Define actual categories before assessment.
Supplied hazards and controls
| Hazard | Initial likelihood score | Initial severity score | Proposed control | Residual likelihood score | Residual severity score |
|---|---|---|---|---|---|
| Second training example | 4 | 3 | Documented example control | 2 | 3 |
- Initial and residual score = supplied likelihood × supplied severity.
- Hazards recorded: 1
- Scale description: Example ordinal scales 1–5. Define actual categories before assessment.
A smaller score does not by itself demonstrate that a control is effective or a risk is acceptable.
Check your understanding
1. Which relationship is used?
User-defined ordinal risk score = likelihood × severity; compare initial and residual scores within the same stated scales.
2. Which assumption should you check first?
Scores are prioritisation aids, not probabilities or proof of acceptable risk. Controls and residual scores need independent assessment; no automatic low/medium/high labels.
3. How should you verify a different unit system?
Convert every input to the displayed calculation units first. Equivalent physical inputs must give equivalent results; a unit label alone does not convert a number.
Continue with the matching exam topic
This tool connects to Certified Safety Professional (CSP) free practice. Work through a question independently, then use the calculation steps to identify where your method differs. The tool stays free whether or not you choose paid preparation.