Conformance to Requirements

Conformance to Requirements

During the life cycle of a given PartVersion manifold situations are existing, where the conformance of that PartVersion to a set of requirements must be demonstrated or is required to be known. To represent the result of such a conformance test, the VEC offers the RequirementsConformanceSpecification and the RequirementsConformanceStatement.

As the RequirementsConformanceSpecification is a PartOrUsageRelatedSpecification, it can be used to express conformance for a set of PartVersions or PartUsages. The DocumentVersion in which the RequirementsConformanceSpecification is contained, normally represents the original document by which the conformance was approved (e.g. a type rating).

The actual conformance is expressed with RequirementsConformanceStatements. It can be used to document a successful or explicitly failed conformance test. The requirements for which the state is valid, are referenced as a DocumentVersion via the requirementsSpecification association.

If a RequirementsConformanceStatement is omitted for a PartVersion, this does not imply any conformance information at all. The RequirementsConformanceStatement can be missing because the component has never been tested according to the specification, or it has been tested, but the information was not transferred within this specific VEC instance, or the information is just not available in a digitally analysable form.

The VEC does not impose any restrictions on the kind of requirements specifications for which conformance can be expressed. This can be for example:

  • A standard (company or public) like an ISO or a DIN.
  • A definition of requirements in the sense of a specification sheet.
  • Requirements that allow certain handling procedures (e.g. suitability for production automation)

The VEC does not impose any restrictions on how the conformance must be demonstrated. This can be done with well-defined testing procedure, a manual assessment, an audit, a type examination or anything else. Normally the requirements specification itself defines how conformance to it must be demonstrated.