 The book explains service models and gives examples of different models and how they are expressed in actual service practice, it lays out what Wolfensberger calls the “tool subjects” for understanding and applying model coherency, and it provides a step-by-step method for designing a service so as to be maximally model-coherent as well as being as social role-valorizing as possible.There is also a model coherency rating for assessing the degree of model coherency of an existing service.Both the design and assessment are meant to be done by a team of people versed in both the model coherency construct as well as the accompanying tool subjects.