(2)The quality of data and the number of observations that are available to determine future shocks for non-modellable risk factors may vary significantly from one non-modellable risk factor to another. It is therefore necessary to ensure that extreme scenarios of future shock cover a wide range of cases. For that reason, it is necessary to provide for alternative sets of methodologies that institutions may use depending on the quality and the number of observations that are available for each non-modellable risk factor. Furthermore, institutions should reflect in their calculations the fact that fewer available data leads to a higher uncertainty of the estimates or values used to determine the extreme scenarios of future shock and should therefore become more conservative.