The new regulations of Basel II demand a greater consideration of operational risks in the supervision of banks. As a result, alongside capital requirements, the internal monitoring systems relevant to operational risks are coming into focus. Britta Kunze analyzes how the existing and planned legal provisions, along with their business and regulatory specifications, impact the prevention of loss events and the avoidance of banking crises due to operational risks. She incorporates the overall framework of bank supervision and examines not only the management but also the internal and external auditors, the supervisory body, the banking supervision authority, and the capital market. It becomes evident that to prevent banking crises, qualitative monitoring measures must be cause-oriented.