The SSM should create more homogeneity by imposing common principles about methods and models’ parameters in order to improve the reliability of banks’ internal models.
The Basel Committee is also discussing how to address this issue and some countries have  2  See “The European Crisis and the role of the financial system” speech by Vítor Constâncio, Vice-President of the ECB, at the Bank of Greece conference on “The crisis in the euro area” Athens, 23 May 2013. http://www.ecb.europa.eu/press/key/date/2013/html/sp130523_1.en.html.