This edition of Joint Publication (JP) 5-0, Joint Operation Planning, reflects the current doctrine for conducting joint, interagency, and multinational planning activities across the full range of military operations. This keystone publication forms the core of joint warfighting doctrine and establishes the framework for our forces' ability to fight as a joint team. As our military continues to serve and protect our Nation in complex conflicts across the globe, it is appropriate that we continue to refine our doctrine and update our planning practices based upon experience and hard won knowledge. As a result of relevant joint force experience and knowledge, the practice of operational design and its relationship to operational art and the joint operations planning process is reflected in this revision of JP 5-0. Likewise, the practice of Adaptive Planning and Execution has continued to evolve since the last publication of JP 5-0. This volume provides necessary updates to that process, as our combatant commands have continued to develop their ability to provide military options for contingencies and we seek to develop tools that allow for more rapid development, review, and refinement of plans at the accelerated pace we find the world requires today. Given the operational environment is not simple or static, adaptation and flexibility are necessary in planning and execution. This edition of JP 5-0 seeks to arm joint force commanders with processes that allow for that flexibility. I encourage leaders to ensure their organizations understand and use joint doctrine and this manual in particular as you continue to assist our Nation in advancing its enduring interests.