Which type of plan may or may not have an associated time phased force and deployment data (TPFDD)?

The concept plan is a framework that outlines the broad approach and strategy for addressing specific scenarios or missions without necessarily detailing specific timelines or resource allocations. While it provides a foundation for potential operations, it does not always include the detailed time-phased force and deployment data (TPFDD) that would be characteristic of more developed plans.

TPFDD is primarily associated with operational and contingency plans, where specific timelines, troop deployments, and resource management are essential for executing the mission effectively. Strategic plans focus on long-term goals and objectives, often not requiring the immediate logistical specifics encapsulated in TPFDD.

In summary, the concept plan's nature allows it to exist without a TPFDD, making it distinct from operational, contingency, and strategic plans, which are more comprehensive and detailed in their logistical requirements.