Systematic Inquiry into Models for Rehabilitation (SIMREB) is a framework for designing evaluations of rehabilitation models specifically intended for persons who are only to a limited extent regarded as being capable to speak for themselves and who, therefore, are often entrusted to a professional assessment of their needs. The article identifies the general elements in this model. By looking at both the epistemological level and the practice level from a professional as well as a user perspective the model taps into discourse analysis, institutional ethnography and a wide tradition of evaluation research. The article uses an evaluation of a rehabilitation programme for people with traumatic brain injury (TBI) as an example to illustrate the different elements of the SIMREB model.