(6)Article 78 of Directive 2013/36/EU also requires the competent authorities to assess the quality of the internal approaches and the degree of variability observed in particular approaches. The competent authorities' assessment should therefore not focus only on the internal approaches' outcome but also on the key variability drivers and should draw conclusions from the different modelling approaches and options that institutions use in their internal approaches. Institutions should therefore also be required to report the results of the use of historically observed risk parameters for credit risk and their profit-and-loss time-series for market risk.