A cyclic process containing four distinct, but interrelated phases: planning, programming, budgeting, and execution. In addition to establishing the framework and process for decision making on future programs, the process permits prior decisions to be examined and analyzed from the viewpoint of the current environment (threat, political, economic, technological, and resources) and for the time period being addressed. The ultimate objective of PPBE is to provide operational commanders the best mix of forces, equipment, and support attainable within fiscal constraints.