ISO 26262-5-2018 PDF

Full title and description

ISO 26262-5:2018 — Road vehicles — Functional safety — Part 5: Product development at the hardware level. This part of ISO 26262 specifies requirements, methods and verification activities for hardware development of safety-related electrical/electronic (E/E) systems in road vehicles, covering hardware safety requirements, architectural metrics, evaluation of random hardware failures and hardware integration and verification.

Abstract

This document provides a framework and normative requirements for product development at the hardware level for automotive applications. It addresses specification of hardware safety requirements, hardware design, evaluation of hardware architectural metrics (such as single-point and latent-fault metrics), probabilistic evaluation of random hardware failures, and hardware integration and verification. It is intended for safety-related E/E systems in series-production road vehicles (excluding mopeds) and complements other parts of the ISO 26262 series.

General information

• Status: Published
• Publication date: December 2018 (ISO edition 2, 2018-12)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 43.040.10 (Electrical and electronic equipment for road vehicles)
• Edition / version: Edition 2 (2018), replaces ISO 26262-5:2011
• Number of pages: 90 (ISO publication)

Core bibliographic details above are based on the ISO bibliographic record for ISO 26262-5:2018.

Scope

Defines normative requirements and activities for product development at the hardware level within the ISO 26262 automotive functional-safety lifecycle. The scope covers general hardware-development topics, allocation and specification of hardware safety requirements, hardware architectural design, evaluation against architectural metrics (e.g., single-point fault metric, latent fault metric), probabilistic assessment of safety goal violations due to random hardware failures, and hardware integration and verification. It is applicable to both non-programmable and programmable hardware elements (for example ASICs, FPGAs, PLDs) and is intended to be used together with other parts of ISO 26262 and related guidelines.

Key topics and requirements

• Specification and allocation of hardware safety requirements derived from system and software safety requirements.
• Hardware architectural design principles to meet allocated ASILs (Automotive Safety Integrity Levels).
• Evaluation of hardware architectural metrics: single-point fault metric (SPFM), latent fault metric (LFM), and others.
• Probabilistic analysis of random hardware failures and methods to show compliance with target failure rates.
• Hardware integration, verification and related work products required to demonstrate compliance.
• Guidance for applying requirements to programmable and non-programmable hardware elements; cross-reference to ISO 26262 guideline parts.

Typical use and users

Primary users are OEMs (vehicle manufacturers), Tier-1 and Tier-2 suppliers, hardware architects, safety engineers, verification/test engineers, and certification/assurance teams who develop or assess safety-related E/E hardware for road vehicles. The part is used during hardware-phase activities of the safety lifecycle to allocate and verify hardware safety requirements and to perform architectural and probabilistic analyses to support ASIL targets. Tool vendors and consultants providing ISO 26262 training and assessment also frequently reference this part.

Related standards

ISO 26262-5:2018 is one part of the ISO 26262 series (functional safety for road vehicles). Closely related parts include: ISO 26262-1 (vocabulary and general), Part 3 (concept phase), Part 4 (system-level development), Part 6 (software development), Part 7 (production/operation/service), Part 8 (supporting processes), and the guideline parts ISO 26262-10 and -11 (guidance and semiconductor application). National adoptions (e.g., BS ISO 26262-5:2018) and industry guidelines complement the standard for implementation and assessment.

Keywords

Functional safety, automotive, hardware development, hardware safety requirements, ASIL, single-point fault metric, latent fault metric, probabilistic hardware failure, E/E systems, ASIC, FPGA, verification, integration.

FAQ

Q: What is this standard?

A: ISO 26262-5:2018 is Part 5 of the ISO 26262 family and sets normative requirements for product development at the hardware level for safety-related electrical/electronic systems in road vehicles.

Q: What does it cover?

A: It covers specification and allocation of hardware safety requirements, hardware architectural design, evaluation of architectural metrics (e.g., SPFM/LFM), probabilistic assessment of random hardware failures, and hardware integration and verification activities necessary to meet ASIL targets.

Q: Who typically uses it?

A: Vehicle OEMs, suppliers (hardware/Tier‑1/Tier‑2), hardware and safety engineers, verification/test teams, and consultants or assessors involved in demonstrating functional safety for automotive hardware. Tool vendors and training providers also reference this part.

Q: Is it current or superseded?

A: ISO 26262-5:2018 is the second edition published in December 2018 and replaces ISO 26262-5:2011. It remains the current ISO edition for Part 5 as published by ISO; like other ISO standards it is subject to periodic review and possible revision. For bibliographic status and revision notices consult ISO’s official record.

Q: Is it part of a series?

A: Yes — ISO 26262 is a multipart international standard on functional safety for road vehicles; Part 5 is the hardware-focused part within that series and is intended to be used together with the other parts (system, software, management, supporting processes, and guidelines).

Q: What are the key keywords?

A: Functional safety, automotive, hardware safety requirements, ASIL, single-point fault metric, latent fault metric, probabilistic metrics, E/E systems, ASIC, FPGA, verification.