text: Chapter 3
  physical environment is based. Figure 3-1 shows an example of how the warfighting functions, engineer
  tasks, and engineer disciplines are used to organize and integrate theater echelon engineer requirements.
  Figure 3-1. Theater-level engineer shape and prevent
  Setting the theater for engineers includes establishing, maintaining, and defending bases or base
  clusters—from an APOD/SPOD to an intermediate staging base. Managing the basing process and individual
  bases spans across the basing life cycle. It ranges from considering the acquisition (and later disposal) of real
  estate; real property; materials; construction labor; base setup; decommissioning; and transfer back to an HN
  or other authority. Most of this planning and management is logistical in nature. A key part of the logistical
  puzzle is managing Class IV (barrier and construction material) and Class V explosives. It is important to
  manage these classes of supply separate from the others because they help to serve very distinct and separate
  purposes (base defense, infrastructure security, general force protection measures, and occasionally
  breaching).
  Infrastructure survey teams use infrastructure assessments to prioritize the categories and parts of the
  infrastructure that require reexamination during the infrastructure survey. The FEST-A is capable of
  providing infrastructure assessment. The following are some considerations used to evaluate infrastructure
  operational requirements:
  * Does existing or planned infrastructure meet the operational needs over those of the campaign
  phases in terms of quantity, quality, location, and force protection?
  * Will infrastructure meet coalition, unified action partner, and host-nation needs over time?
  * Should infrastructure be repaired, upgraded, maintained, or newly constructed?
  * What are the infrastructure defense and protection needs over time, by type and scalability?
  * Is any part of the infrastructure on the critical asset list, defended asset list, or protection
  prioritization list?