- Conceptual enhancements:
Enhanced requirements, regulations and standards may result in an ageing of certificates.
- Technological enhancements:
Technical advances / technological obsolescence have to be met. Enhanced test procedures or evaluation methodologies require a re-evaluation of some (old) analysis results.
- Physical ageing:
Ageing of systems, structures and components (SSC) due to physical, chemical and biological effects, resulting in degradation, corrosion, wear, etc.
Guidelines, rules and standards
For Ageing Management some relevant references are listed below: