Insurance and reinsurance undertakings shall implement a regular model validation cycle, which includes monitoring the functioning of the internal model, checking the ongoing appropriateness of its specifications, and comparing the results it produces with data derived from experience.
The model validation process includes an effective statistical process for validating the internal model, enabling insurance and reinsurance undertakings to demonstrate to the Autorité de contrôle prudentiel et de résolution that the resulting capital requirements are appropriate.
The statistical methods used serve to verify the appropriateness of the forecast probability distribution in relation not only to historical loss experience but also to any significant new data and information relating thereto.
The model validation process includes an analysis of the stability of the internal model and, in particular, a test of the sensitivity of the results it produces to a change in the fundamental assumptions underlying it. It also includes an assessment of the accuracy, completeness and appropriateness of the data used in the internal model.
This validation process and its parameters are specified in Articles 241 and 242 of Commission Delegated Regulation (EU) 2015/35 of 10 October 2014.