3-9. Mission success depends as much on preparation as on planning. Higher headquarters may develop the best of plans; however, plans serve little purpose if subordinates do not receive them in time to understand them, develop their own plans, and prepare for the upcoming operation. As part of the operational timeline, commanders allocate sufficient time for preparation. This includes time for detaching units, moving forces, and receiving and integrating new units and Soldiers into the force. It includes time to rehearse the operation to include designating the type of rehearsals. Commanders prioritize preparation activities by issuing specific instructions in WARNORDs and the OPORD.