ISO 24096-2:2024

Overview

ISO 24096-2:2024 - Technical product documentation (TPD) - Part 2 describes a method to classify requirements in product documentation by combining severity and susceptibility. Designed to complement the framework in ISO 24096-1, this standard provides guidance for consistent, organisation-specific classification systems that communicate the consequences of requirement nonconformity in the FUN‑SPEC and other TPD. It is a 2024 first‑edition ISO standard intended primarily for industry (e.g., automotive, aerospace) but applicable across engineering disciplines.

Key topics

• Three‑step classification method
  • Step 1: Evaluate severity - identify functions, effects of function deviation, and map effects to a severity rating using a severity list.
  • Step 2: Evaluate susceptibility - identify which requirements most affect a function and how quickly function deteriorates when requirements deviate.
  • Step 3: Weigh severity and susceptibility together to determine the final classification (examples shown as diagram templates in the standard).
• Severity lists - normative, organisation‑defined tables that standardise how different effects map to severity ratings to reduce arbitrary assessment.
• Function‑driven assessment - use the function of the design solution as the route to determine severity and the impact of deviating functions.
• Requirement pyramid and susceptibility guidance - how different requirement types relate to susceptibility and practical evaluation steps.
• Annexes - Annex A provides classification examples; Annex B offers additional guidance on susceptibility.
• Mandatory parameters - severity and susceptibility are required parameters for classification; the standard clarifies how to combine them without overloading TPD with classification indications.

Applications

• Use ISO 24096-2 to:
  • Prioritise inspection and quality assurance resources (purchasing, production control, revision) by communicating consequence levels of nonconformity.
  • Support product safety, quality and brand objectives via consistent, auditable classification practice.
  • Integrate classification results into functional specifications (FUN‑SPEC) and technical drawings to inform downstream stakeholders.
• Typical users:
  • Technical writers, product engineers, quality managers, suppliers and procurement teams in automotive, aerospace and other engineered‑product sectors.
  • Organisations creating or harmonising an internal classification system for TPD.

Related standards

• ISO 24096-1 (Framework for classification)
• ISO/TS 21619 (FUN‑SPEC – functional specification)
• ISO 8015, ISO 10209, ISO 12100, ISO 41014 (referenced standards and context)

Keywords: ISO 24096-2, technical product documentation, TPD, classification of requirements, severity and susceptibility, severity list, FUN‑SPEC, product documentation.