EN ISO 24096-2:2024 is Part 2 of the ISO 24096 series on Technical Product Documentation (TPD). It specifies a practical method for the classification of requirements using two parameters: severity (consequences of nonconformity) and susceptibility (how much a function is affected by a deviation). The standard is intended to be used with the framework in ISO 24096-1 to create a complete, repeatable classification system for product requirements and FUN‑SPEC (functional specifications).
Key topics and technical requirements
- Purpose: provide a consistent method to evaluate and classify product requirements so stakeholders understand the consequences of nonconformity.
- Two-parameter classification:
- Severity - normative assessments of impact (maintained via a company “severity list”).
- Susceptibility - degree to which a function is affected by a deviation; used to balance classification and avoid overload.
- Methodology:
- A three-step approach: evaluate severity, evaluate susceptibility, then weigh severity and susceptibility together to reach a final classification.
- Use function descriptions as the route to determine severity and to assess effects of deviating functions.
- Supporting elements:
- Guidance on consistent evaluation of severity over time to align with business models and brand image.
- Annex A: classification examples (informative).
- Annex B: guidance on susceptibility (informative).
- Normative references include ISO 24096-1, ISO 8015 and ISO 10209; the method assumes integration into existing contractual, regulatory and quality systems.
Applications - who uses it and why
- Primary users: design engineers, systems engineers, technical authors, quality managers, procurement and supplier quality teams, document controllers in industries such as automotive, aerospace, and other engineering sectors.
- Practical uses:
- Prioritise inspection, testing and production resources by signalling which requirements carry greater risk if nonconforming.
- Communicate potential consequences of deviations in FUN‑SPEC and TPD to downstream suppliers and manufacturing.
- Support quality assurance, product safety assessments and supplier management.
- Help maintain brand integrity and business model alignment by providing consistent severity evaluation over time.
Related standards
- ISO 24096-1 - Technical product documentation (TPD): Framework for classification systems
- ISO 8015 - Geometrical product specifications: fundamentals
- ISO 10209 - TPD vocabulary (terms for technical drawings and product definition)
- ISO/TS 21619 - FUN‑SPEC guidance referenced in the standard’s introduction
EN ISO 24096-2:2024 is a practical, industry-focused standard for embedding severity-and-susceptibility classification into TPD workflows to improve decision-making, risk communication and resource allocation across product lifecycles.
