 The service processes include the service setting, the way the people served are selected and grouped, the identities of the servers, the activities and methods and “tools” used to deliver the content, and the language that is used to refer to all this.This combination of elements constitutes a service model, and then models get applied to actual persons.If the model elements fit together, it is said to be a coherent model; but if there are elements that do not fit well or mesh with each other, and if the model or elements thereof do not fit the needs of the people served, then there is some type of model incoherency.