062611e1_anual_for_asset_quality_review__Description
[0] 3 [Working block] Sampling [Description] 
The portfolios reviewed exceed 50% of risk weighted assets for all banks subject to the comprehensive assessment. Given the volume of analysis involved, it is not possible to review all exposures in the selected portfolio. Samples will therefore be taken, whereby specifics (such as loan classification and provisioning) of a particular credit (i.e. loans, advances, commitments or other off-balance sheet exposure) will be looked at in detail. The samples chosen must be both large and representative enough to allow for a robust analysis. The size of the sample will depend on the homogeneity of the portfolio, the risk of the portfolio, the total number of debtors and the level of debtor concentration.
ECB publishes manual for asset quality review
Description