The article depicts the international scientific project - DEMoB.inc. which aims to develop a European tool kit for assessing quality of care provided by long-term psychiatric and social care facilities. Positive aspects of rehabilitation of people with profound and chronic mental disturbance, as well as health care system shortcomings leading to patients' social exclusion, abuse and violation of basic human rights have been shown. While describing the six phases of the research, special attention has been paid to the first one based on the Delphi method. The implementation of the method in the development the tool kit's international core and local clip-ons as well as its general characteristics have been presented. Association between tool kit assessments and patients' quality of life, autonomy, markers of recovery as well as the MANSA and the Resident Choice Scale have been described. Economic analysis - value for money (VfM), the CSRI scale and potential dissemination activities on an inter-national and local level have been proposed.