Main Body Linear Model of Adult Education Program Planning In the course of history, different planners applied various models of education program planning and the estimation of their value and efficiency should be done in order to maximize the learning opportunities. Cervero (1994) says: “… program planners … are practical theorists who must use their intuition to make judgments about what to do in specific contexts …” (p. Planners are people who manage the process of planning, create aims and establish criteria and guidelines for planning.