The importance of stress testing has never been more evident that in today's financial crisis, which has shown the limitations of the current risk management activities in the financial industry and illustrated the acute need for their serious reconsideration. In stress situations, the usual models for risk management may no longer be valid. Internal models play an important role in determining the risk-bearing capacity for banks and asset management companies, especially after the full implementation of the Basel 2 requirements. However, the risk types - credit risk, market risk and operational risk - are still considered in isolation in pillar 1 and the internal capital adequacy assessment process in pillar 2 has not yet been strictly implemented. These isolated views need to be brought together in an integrated approach. This book presents processes for integrated risk modelling , discussing stress testing methods not only by risk type but also from a holistic perspective. This model also serves as a response to the regulatory requirements formulated in the Internal Capital Adequacy Assessment Process (ICAAP), which is discussed in detail in this book.