The current social security system in Belgium uses the KATZ-scale to determine the care-needs, to plan the care, to finance care and to admit elderly to nursing-homes. According different sources, from care-givers in the field to researchers, this scale is too limited for the many complex situations. Therefore the Belgian government requested to test and evaluate other instruments in the field, instruments which are better suited for these complex situations. The goal of testing these instruments is to determine the care-needs of the individual elderly as a base for the development of a care-plan. With a care-plan it is possible to couple appropriate actions, (re)-assign human and financial resources to elderly. A care-plan is more effective and beneficial for both the government and the elderly if the care-needs are mapped correctly with the most suitable instruments. Another important goal is to examine the feasibility of completing these instruments in the different work environments of care-givers. The task of gathering the care needs of the elderly, completing the instruments thus, is performed by different kinds of care-givers from different retreats, rest- and service homes, day-care centre, G-services, etc.