JP 3-0, page 113

Joint Operations Across the Range of Military Operations V-7 from one phase to another and plans sequels and branches for potential contingencies. Phases are designed to be conducted sequentially, but some activities from a phase may begin in a previous phase and continue into subsequent phases. The JFC adjusts the phases to exploit opportunities presented by the adversary and operational situation or to react to unforeseen conditions. d. Transitions (1) A transition marks a change of focus between phases or between the ongoing operations and execution of a branch or sequel. Transitions between phases are designed to be distinct shifts in focus of operations by the joint force, often accompanied by changes in command or support relationships and priorities of effort. They require planning and preparation well before their execution. The activities that predominate during a given phase, however, rarely align with neatly definable breakpoints. The need to move into another phase normally is identified by assessing that a set of objectives has been achieved or that the enemy has acted in a manner that requires a major change in focus for the joint force. Thus, the transition to a new phase is usually driven by events rather than time. An example is the shift of focus from sustained combat operations in the dominate phase to a preponderance of stability operations in the stabilize and enable civil authority phases. Through continuous assessment, the staff measures progress toward planned transitions so that the force prepares for and executes them. (2) Sometimes, however, the situation facing the JFC will undergo an unexpected change in conditions that is not necessarily associated with a planned transition, yet may require the JFC to direct an abrupt shift in operations. Such a change in conditions will rarely be uniform in time and space across an operational area, but can represent a critical period in the course of operations. The JFC must be able to recognize this fundamental transformation in the situation, and transition quickly and smoothly in response. Failure to do so can cause the joint force to lose momentum, miss an important opportunity, experience a significant setback, or even fail to accomplish the mission. Conversely, successful transition can allow the joint force to seize the initiative in a situation and garner disproportionately favorable results. The JFC must seek to anticipate potential situational transformations as well as planned shifts during the course of operations. e. Phasing Model. Although the commander determines the number and actual phases for the operation, the phases shown in Figure V-3 and described below comprise a flexible model to arrange combat and stability operations. Within the context of these phases established by a higher-level JFC, subordinate JFCs and component commanders may establish additional phases that fit their CONOPS. OPLANs for contingencies that support the CCDR’s TCP generally do not include security COMMON OPERATING PRECEPT Plan for and manage operational transitions over time and space.