Consultation involves a consultant, consultee, and client, with the goal of bringing about positive change in the client. The consultant works through the consultee to indirectly serve the client. There are different types of consultation including client-centered, consultee-centered, program-centered, and consultee-centered administrative consultation. Effective consultation follows phases including entry, defining the problem, analyzing alternative actions, dealing with barriers, and termination. Consultation can also involve working with groups.