The aim of the study is to identify and evaluate incentive mechanisms for the implementation of quality-relevant care processes. The objective is to correlate adherence to individual process-based quality indicators or their combination with outcome data. In addition, cost shares and case revenues are evaluated. Indices are also derived from routine data that may represent additional influencing factors (Charlson Comorbidity Index or secondary diagnoses that increase case severity based on ICD-10 coding and procedures based on the Surgery and procedure codes system).