text: FM 2-22.3
  PART THREE
  The HUMINT Collection Process
  Part Three discusses the logical progression of phases involved in all HUMINT
  collection. There are five phases and the related task of screening that are critical to
  HUMINT collection. This remains consistent with previous doctrine as captured in
  the interrogation process but adds screening as a phase and combines approach
  and termination. The five phases are screening, planning and preparation, approach
  and termination strategies, questioning, and reporting.
  Chapter 6
  Screening
  6-1. Available human sources and documents almost always exceed the
  qualified HUMINT collection assets and resources that can be applied
  against them. Screening facilitates the efficient application of these limited
  assets and resources to maximize the collection of relevant information.
  HUMAN SOURCE SCREENING
  6-2. As it applies to HUMINT operations, screening is the process of
  evaluating and selecting human sources and documents for the prioritized
  collection of information based on the collection requirements and mission of
  the unit conducting the screening or its higher headquarters. Screening
  categorizes and prioritizes sources based on the probability of a particular
  source having priority information and the level of cooperation of the source.
  Screening is also used to determine if a source matches certain criteria that
  indicate that the source should be referred to another agency. Screening is
  conducted at all echelons of command and in all operational environments.
  There are two general categories of screening: human source screening and
  document screening. Human source screening will be explained in depth in this
  chapter. Document screening is explained in Appendix I.
  6-3. The resources (time and personnel) allocated to screening must be
  balanced against those required for interrogations, debriefings, and other
  collection methodologies. Although screening is not in itself an information
  collection technique, it is vital to the rapid collection of information. Through
  screening, the effectiveness of limited collection assets can be maximized by
  targeting those assets against the sources with the highest potential of
  providing key information. Screening requires experienced individuals with