Glossary · Evidence, assurance and traceability
Safety plan
Also known as: functional safety plan
German: Sicherheitsplan
In functional safety under IEC 61508 and IEC 61511, a safety plan is the document that defines the activities, responsibilities, procedures, schedule and deliverables needed to carry out the safety lifecycle phases for a specific project or system.
- Functional safety
- Technical documentation
In one sentence
A safety plan defines the activities, responsibilities, methods and deliverables for each safety lifecycle phase of a project.
Example
The safety plan for a compressor station SIS lists who performs the hazard and risk analysis, which tool is used for SIL verification, and when the functional safety assessments take place.
How it applies
- Planning: The safety plan turns the generic lifecycle into a project plan: phases, inputs and outputs, methods, tools, responsible persons and required independence.
- Verification and assessment: It schedules verification activities and functional safety assessments and names who performs them.
- Change: The safety plan is a living document. It is updated when the scope, organization or lifecycle activities change.
- Documentation: Treat the safety plan as a Controlled document with revision history. The documentation team can help by giving each deliverable a clear owner, status and location, so that the resulting Evidence package can be assembled without gaps.
Safety plan vs. validation plan
The safety plan covers all lifecycle activities and the organization behind them. A Validation plan covers only how and when the installed system will be shown to meet its safety requirements. The validation plan is usually referenced from the safety plan.