Safety Standards: IEC 61508, ISO 26262
IEC 61508 and ISO 26262 are international safety standards focused on digital electronics and computing systems. IEC 61508 addresses functional safety for electrical, electronic, and programmable systems across various industries, ensuring risk reduction and safe operation. ISO 26262 is tailored specifically for automotive applications, emphasizing the safety lifecycle of electronic systems in vehicles. Both standards guide the development, validation, and verification processes to minimize hazards caused by system failures.
Safety Standards: IEC 61508, ISO 26262
IEC 61508 and ISO 26262 are international safety standards focused on digital electronics and computing systems. IEC 61508 addresses functional safety for electrical, electronic, and programmable systems across various industries, ensuring risk reduction and safe operation. ISO 26262 is tailored specifically for automotive applications, emphasizing the safety lifecycle of electronic systems in vehicles. Both standards guide the development, validation, and verification processes to minimize hazards caused by system failures.
💡 Key Takeaways
- Understand the purpose and scope of IEC 61508 for functional safety across industries.
- Learn how Safety Integrity Levels (SIL) quantify risk reduction and drive safety requirements.
- See how ISO 26262 adapts IEC 61508 for automotive safety, including ASILs and automotive lifecycle processes.
- Identify the main phases of the functional safety lifecycle (concept, development, production, operation, maintenance) and key verification/validation activities.
❓ Frequently Asked Questions
What is IEC 61508?
IEC 61508 is a generic functional safety standard for electrical/electronic/programmable electronic (E/E/PE) systems across industries. It defines the safety lifecycle and uses Safety Integrity Levels (SIL 1–4) to require appropriate evidence for safety-related functions.
What is ISO 26262?
ISO 26262 is the automotive-specific functional safety standard derived from IEC 61508. It tailors the safety framework to road vehicles and defines Automotive Safety Integrity Levels (ASILs: QM, A, B, C, D) along with a dedicated safety lifecycle from concept to decommissioning.
What are SILs and ASILs and how do they relate?
SILs (1–4) come from IEC 61508, while ASILs (QM, A–D) come from ISO 26262. Both express required rigor for safety functions; higher levels demand more rigorous design, analysis, and verification. ISO 26262 maps to IEC 61508 concepts for automotive applications.
What are the main phases of the safety lifecycle in these standards?
Key phases include hazard analysis and risk assessment, safety goals and requirements, system/hardware/software design, verification and validation, safety case, and production/operation/maintenance with change management and eventual decommissioning.