text: Transition to a Joint Headquarters
  D-40. The joint training tables in TC 6-6 allow for a “crawl, walk, run” approach to transitioning. Along with
  initial guidance and receipt of orders from higher echelon headquarters, an Army unit may conduct staff
  exercises, warfighter exercises, and participate in external evaluations as it prepares for transition. The staffs
  capture their progress in the Joint Training Information Management System to determine effectiveness and
  to create training proficiency assessments.
  EXERCISING THE HEADQUARTERS
  D-41. Units may increase their proficiency and readiness for transitioning to joint headquarters, by
  conducting exercise events. Headquarters forming exercises are based on potential missions; they stress staffs
  to identify deficiencies and create opportunities to gain efficiencies. These events can be conducted as part
  of a Joint Chiefs of Staff exercise or as a separate training event.
  D-42. Joint headquarters readiness events can be designed to exercise the formation of the joint headquarters
  under combatant command-defined conditions. A forming exercise builds trust between organizations,
  increases understanding in the combatant command of its requirements for a joint headquarters, and exercises
  the joint headquarters on the most probable mission sets. A forming exercise takes the place of a traditional
  Army staff exercise (also known as STAFFEX) or command post exercise (also known as CPX).
  D-43. After the completion of the joint training tables and other staff exercises, a final evaluation, and the
  combatant command joint exercise (also known as a JT-X) serve as the capstone events. This is an operational
  capability assessment certification conducted to allow the commander to certify the status of the unit and its
  ability to execute the roles and responsibilities of a JTF. Upon completion of a combatant command joint
  exercise, the combatant commander or designated representative certifies the transition is complete. (See
  TC 6-6 for more information on exercising and training Army units to be a joint force headquarters.)