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Procedure qualification tests

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Definition: Procedure qualification tests are qualifying tests to confirm that a technical process reproducibly delivers the required properties under defined conditions. They serve to demonstrate process capability and process stability. The requirements arise from standards or project-specific specifications.

Practical relevance: Examples include welding procedure qualification tests (DIN EN ISO 15614), brazing/soldering procedure qualification tests or qualifications of additive manufacturing processes. Mechanical characteristic values, microstructure, dimensional accuracy or leak-tightness are assessed. The documented range of validity defines the permissible parameters and material groups.

Decision-making perspectives:

  • Technical decision-makers: Ensuring that processes achieve the required quality under series production conditions.
  • Purchasing/project management: Requiring valid qualification certificates before awarding a contract.
  • Science: Analysis of process parameters and their influence on material properties.
  • Insurance/law: Proof of standard-compliant process qualification in the event of damage.

Typical testing or verification methods: Mechanical tests, metallographic examinations, NDT, documentation in the test report.

FAQ:

  • What is the purpose of a procedure qualification test?
  • The formal proof that a defined procedure reproducibly achieves the required quality under specified parameters.
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