This chapter contains two downloadable products. The details of each product can be found below:
Guidance for writing a Functional Safety Concept (ISO 26262-3:2011 Clause 8)
The guidance provided covers how to achieve the objectives of the standard and thus meet the specific requirements of ISO 26262. The guidance includes:
- Advice on ensuring that the required inputs are adequate
- How to formulate the wording of the requirements
- How to derive the functional safety requirements from the inputs to meet the safety goals, using a hypothetical example.
- How to specify strategies for:
- Fault avoidance
- Fault detection and mitigation of faults
- Transitions to safe states
- When to exist a safe state
- Fault tolerance
- Degradation of the functionality
- Driver warnings
- Fault Tolerant Time Intervals
- Correct arbitration of multiple control requests
- How to use FTA and FMEA in order to develop a complete set of functional safety requirements
- What is an emergency operation and when it should be specified
- How to identify assumptions made about the necessary actions of the driver and what to do about specifying them in the functional safety concept
- Guidance on the allocation of FSRs to architectural elements, strategies to follow and methods to consider.
- Guidance for how to treat elements of other technologies in the FSC
- Guidance for how to treat external elements in the FSC.
- Guidance on determining the acceptance criteria for safety validation.