ABSTRACT
In this chapter, we use the generic term planning to encompass both planning and scheduling problems, and the terms planner or planning system to refer to software for planning or scheduling. Planning is concerned with reasoning about the consequences of acting in order to choose from among a set of possible courses of action. In the simplest case, a planner might enumerate a set of possible courses of action, consider their consequences in turn, and choose one particular course of action that satisfies a given set of requirements.
