The Operationalised Psychodynamic Diagnostic (OPD) is a multiaxial psychodynamic diagnostic system that is now a widely accepted standard in psychodynamic diagnostics for clinical and research purposes. Numerous empirical studies show the validity of the OPD findings.Thanks to the clear operationalisation, supplemented by case examples and working materials, essential components of psychodynamic models - experience of illness, relationship patterns, intrapsychic conflicts, availability of structural functions - can be reliably recorded:Axis I Experience of illness and prerequisites for treatmentAxis II RelationshipAxis III ConflictAxis IV Structure Impairments associated with vulnerabilities.New in the OPD-3: All axes have been made more precise and more dimensionally orientated. The dynamic interplay of the axes, particularly between conflict and structure, can now be depicted in a more differentiated way. As the OPD is based on a semi-standardised, very clinically oriented interview, this manual is equally suitable for research and clinical practice and is an indispensable companion for determining indications, focus and therapy planning.online materials (rating sheets, which can also be downloaded as additional digital materials from the Hogrefe media library) facilitate the use of the OPD-3.