1. The document discusses various models of the consulting process including Schein's problem solving model, Lippitt and Lippitt's consulting process model, Block's flawless consulting model, and the systemic consulting loop model.
2. It also outlines different roles consultants can take including expert, pair of hands, and collaborative according to Schein as well as objective observer, process counselor, fact finder, identifier of alternatives, joint problem solver, trainer/educator, information specialist, and advocate according to Lippitt and Lippitt.
3. The models and roles are intended to help consultants match their approach to the complexity of the project and needs of the client.