text: Chapter 4
  purpose, scope, and effect desired when one capability supports another. Establishing clear command and
  support relationships is fundamental to organizing any operation. The commander designates command and
  support relationships to weight the decisive operation or main effort and support the concept of operations.
  The commander considers two organizational principles when task organizing forces; maintain cohesive
  mission teams and do not exceed subordinates’span of control capabilities.
  Tasks to Subordinate Units
  4-72. The BCT commander and staff assign tasks to subordinate units. The assignment of a task includes not
  only the task (what), but also the unit (who), place (where), time (when), and purpose (why). A task is a
  clearly defined action or activity specifically assigned to an individual or organization that must be done as
  it is imposed by an appropriate authority (JP 1). Tasks are specific activities that direct friendly action and
  contribute to mission accomplishment and other requirements. The purpose of each task should nest with
  completing another task,achieving an objective,or attaining an end state condition.
  Coordinating Instructions
  4-73. Coordinating instructions pertain to the BCT as a whole. Examples include CCIRs,essential element
  of friendly information(EEFI),fire support coordination measures and airspace coordinating measures,rules
  of engagement,risk reduction control measures,personnel recovery coordination measures,and the time the
  operation order becomes effective or the condition of the BCT when the operation order becomes effective.
  Risk Acceptance
  4-74. The BCT commander uses judgment when identifying risk by deciding how much risk to accept and
  by mitigating risk where possible. The commander accepts risk to create opportunities and reduces risk with
  foresight and careful planning. Consideration of risk begins during planning as the commander, with the
  support of the staff, complete a risk assessment for each COA and proposes control measures. They
  collaborate and integrate input from higher and subordinate commanders and staffs, and unified action
  partners. They determine how to manage identified risks. This includes delegating management of certain
  risks to subordinate commanders who will develop appropriate mitigation measures. Commanders then
  allocate the resources they deem appropriate to mitigate risks. Subordinates require commanders to
  underwrite their own risk acceptance. (See paragraph 4-186 for a detailed discussion of risk management
  [RM].)
  Control Measures
  4-75. A control measure is a means of regulating forces or warfighting functions. Control measures can be
  permissive (which allows something to happen) or restrictive (which limits how something is done) to prevent
  units from impeding one another and to impose necessary coordination. Some control measures are graphic.
  A graphic control measure is a symbol used on maps and displays to regulate forces and warfighting
  functions. (See ADP 1-02 for illustrations of graphic control measures and rules for their use.) Tailored to
  the higher commander’s intent,the BCT commander assigns subordinate units’missions and imposes control
  measures necessary to synchronize and maintain control over the operation.
  4-76. The BCT commander or staff assigns graphical control measures such as boundaries and procedural
  control measures such as target engagement priorities. The commander and staff must understand their
  purposes and ramifications, including the permissions or limitations imposed on subordinates’ freedom of
  action and initiative, to employ control measures effectively. Each control measure should have a specific
  purpose and provide the flexibility needed to respond to changes in the situation. The commander uses
  graphical and written control measures to assign responsibilities, coordinate maneuver, and control the
  airspace user.The BCT operations staff officer (S-3)nests all coordination measures to include movement
  and maneuver control measures,fire support coordination measures,and airspace coordinating measures to
  clarify responsibilities and tasks to reduce risk and facilitate effective military operations. (See FM3-90-1
  and ADP 1-02 for additional information.)