(9)When assessing the overall quality of institutions' internal approaches and the degree of variability observed in particular approaches, competent authorities should not focus solely on the outcomes but should aim at determining the key variability drivers and at extracting conclusions in the different modelling approaches. Competent authorities should therefore be required to take into account the results of the alternative value-at-risk (VaR) and stressed value-at-risk (sVaR) calculations based on the profit-and-loss time-series.