It is argued that the approaches used up to now for analyzing dysfunctional relationship patterns are more or less explicitly based on a conflict model and therefore not adequate for describing relationships characterized by structural impairments of a patient's personality. Using the concepts of conflict and structure as derived from the Operationalized Psychodynamic Diagnostic system (OPD-2), four principles of a dysfunctional relationship formation are discussed. It is shown that the differentiation of conflict- and structure-related pathology is highly significant with regard to the selection of an appropriate psychotherapeutic strategy. Furthermore, the connections between the OPD axes relationship, conflict, and structure are conceptualized.