ISO 26262 – Functional Safety

ISO 26262 – Functional Safety

…is an international standard for electrical and/or electronic systems for automotive industry.

Increasing complexity leads to increasing risks from systematic failures and random hardware faults that could impact negatively on vehicle or system safety.

Goals of ISO 26262:

  • Provides an automotive safety lifecycle (management, development, production, operation, service, decommissioning) and supports tailoring the necessary activities during these lifecycle phases.
  • Covers functional safety aspects of the entire development process (including such activities as requirements specification, design, implementation, integration, verification, validation, and configuration).
  • Provides an automotive-specific risk-based approach for determining risk classes (Automotive Safety Integrity Levels, ASILs).
  • Uses ASILs for specifying the item’s necessary safety requirements for achieving an acceptable residual risk.
  • Provides requirements for validation and confirmation measures to ensure a sufficient and acceptable level of safety is being achieved.

Benefits and purposes:

Functional Safety Process …

… ensures a safe system development of E/E components from the beginning
… provides evidence that all reasonable safety objectives are satisfied
… enables implementation of an efficient safety management system
… is always in accordance to international Best Practice standards
… can be used as a basis for components  selection and supplier qualification
… reduces development and after market costs
… is an improvement of internal quality standards as a whole engineering process


Generic process according to ISO 26262

Funcitonal Safety Generic Process
Funcitonal Safety Generic Process

Item definition shall include all relevant information for upcoming risk assessment

  • What is the purpose of the feature?
  • What is the functionality of the feature?
  • What is an implementation independent boundary diagram?

Our Services:

Item Definiton
Item Definiton Architecture
  • Safety Engineering
  • Safety Management
  • Hazard Analysis and Risk Assessment (HARA)
  • Safety Concepts
  • Safety Assessments
  • Safety Case Review

Functional Safety Concept is the specification of the functional safety requirements (with associated information), their allocation to architectural elements and their interaction necessary to achieve the safety goals.

Safety Goal is a top-level safety requirement as a result of the hazard analysis and risk assessment (HARA).

Functional Safety Concept
Simplified Example: Functional Concept (FC) & Functional Safety Concept (FSC)