Intelligence source and information reliability rating systems are used in intelligence analysis. This rating is used for information collected by a human intelligence collector. This type of information collection and job duty exists within many government agencies around the world.
The system employed by the United States Armed Forces rates the reliability of the source as well as the information. The source reliability is rated between A (history of complete reliability) to E (history of invalid information), with F for source without sufficient history to establish reliability level. The information content is rated between 1 (confirmed) to 5 (improbable), with 6 for information whose reliability can not be evaluated.
For example, a confirmed information from a reliable source has rating A1, an unknown-validity information from a new source without reputation is rated F6, an inconsistent illogical information from a known liar is E5, a confirmed information from a moderately doubtful source is C1.
|A||Reliable||No doubt about the source's authenticity, trustworthiness, or competency. History of complete reliability.|
|B||Usually reliable||Minor doubts. History of mostly valid information.|
|C||Fairly reliable||Doubts. Provided valid information in the past.|
|D||Not usually reliable||Significant doubts. Provided valid information in the past.|
|E||Unreliable||Lacks authenticity, trustworthiness, and competency. History of invalid information.|
|F||Reliability unknown||Insufficient information to evaluate reliability. May or may not be reliable.|
|1||Confirmed by independent Sources||Logical, consistent with other relevant information, confirmed by independent sources.|
|2||Probably true||Logical, consistent with other relevant information, not confirmed.|
|3||Possibly true||Reasonably logical, agrees with some relevant information, not confirmed.|
|4||Doubtful||Not logical but possible, no other information on the subject, not confirmed.|
|5||Improbable||Not logical, contradicted by other relevant information.|
|6||Difficult to say||The validity of the information can not be determined.|
- "What Does an Army Human Intelligence Collector Do?". The Balance. Retrieved 2017-09-10.
- "Human Intelligence Collector | Army.com". army.com. Retrieved 2017-09-10.
- "Covert Human Intelligence Sources | MI5 - The Security Service". www.mi5.gov.uk. Retrieved 2017-09-10.
- "New chief of Mossad, Israel's intelligence agency, has 30 years of experience in operational, intelligence and executive positions". EIPA. 2015-12-16. Retrieved 2017-09-10.
- Montagu, Ewen (1977). Beyond Top Secret U. Peter Davies Ltd. p. 21.
- Human Intelligence Collector Operations. LLMC. Field Manual FM 2-22.3 – via Google Books.