text: Chapter 2
  * Vulnerability − how vulnerable is the asset? Vulnerability assesses an asset’s susceptibility and
  recoverability. Susceptibility includes such factors as the asset’s or force’s hardness and its ability
  to disperse or displace to another position. Recoverability includes such factors as the time it
  would take to repair or recover from damage by enemy attack and if the asset can be replicated
  elsewhere should it be damaged by enemy attack.
  * Threat − how likely is the asset to be surveilled and/or attacked by enemy air and missile threats?
  By what types of threats? In what quantities?
  2-9. Missions and threats are analyzed, and forces are sized, matched, and allocated accordingly. The
  resulting linkage of ADA forces to designated critical assets constitutes the defended asset list – a listing of
  those assets from the critical asset list prioritized by the joint force commander to be defended with the
  resources available (JP 3-01). The JFC further defines the required level of protection for each asset on the
  critical asset list based on mission variables. For ballistic missile defense, for instance, the levels range from
  level 0 (no active defense; accept risk) to level 4 (near leak-proof defense requiring upper and lower tier
  systems operating in an integrated defense). The AADC implements the JFC-directed protection level for
  each asset on the defended asset list based on METT-TC.
  Note. As formally defined and used hereafter, the critical asset list and defended asset list present
  formalized lists of prioritized assets at the theater level that require defense against air and missile
  threats. However, commanders/leaders at all echelons and in all services identify their most critical
  assets that require protection. These assets are compiled into prioritized lists, which though having
  different names, are the equivalents of the critical asset and defended asset lists. For instance in
  the Army corps, the protection cell and work group develop a protection prioritization list and
  protected asset list. See ADP 3-37 for more information.
  2-10. ADA battery commanders and subordinate leaders use troop leading procedures to translate the
  integrated plan into executable actions to achieve an integrated defense. Troop leading procedures are a
  dynamic process used by small-unit leaders to analyze a mission, develop a plan, and prepare for an operation
  (ADP 5-0). See ADP 5-0 for process details.
  TASK ORGANIZATION
  2-11. The METT-TC variables provide the basis for analyzing and selecting the right capabilities to be
  deployed and employed. Knowing the mission, threat, and operational environment allows commanders to
  identify and plan for an optimal capability package. Deployment considerations must also factor in the
  availability of strategic lift – the deployment carriers – and a suitably packaged ADA force to facilitate an
  operational defense as rapidly as possible. This package may consist of a complete battalion-level task force,
  a task-organized battery, or sub-sets of a battery. Task organization must consider elimination of exploitable
  seams in the defense coverage. Seams can be created in azimuth (for example, Patriot sectored coverage), in
  altitude (ingress below or above a sensor’s coverage), and by threat capabilities (for example, use of a threat
  mixed package that includes platforms with capabilities that exceed those of the sensor or shooter in a
  defense).
  2-12. Current capabilities to task organize enable coordinated but not integrated defenses. Coordinated
  defenses are fought at the system level; for example, a system such as Patriot or Avenger is selected to engage
  a threat and other systems in the defense monitor the engaging system’s engagement sequence to decide the
  need for follow-on actions.
  SUPPORT RELATIONSHIPS
  2-13. Support relationships define specific arrangements and responsibilities between supporting and
  supported Army units. Though traditionally focused on Army missions, these relationships are also
  applicable to ADA support of joint and multinational forces. There are four support relationships: direct
  support, general support, general support-reinforcing, and reinforcing. Commanders specify and change
  support relationships through task organization. ADP 5-0 provides expanded details on Army support
  relationships.