An analytic technique created at the CIA, ACH helps you analyze complex situations with multiple hypotheses and countless pieces of evidence. Multiple people can collaborate on a single problem, and ACH will compare everyone's analyses and pinpoint the precise areas of disagreement, allowing for a more focused debate.
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README

Analysis of Competing Hypotheses (ACH) is a simple model for how to think about a complex problem. It is an analytic process that identifies a complete set of alternative hypotheses, systematically evaluates data that is consistent and inconsistent with each hypothesis, and rejects hypotheses that contain too much inconsistent data. It was created in the 1970s at the CIA.

This software is an open source platform for conducting the methodology with several people. 

For information about installation, usage, contributions, etc., see the project site at http://competinghypotheses.org.

Authors:
Copyright Matthew Burton 2010, http://matthewburton.org
Code by Joshua Knowles, http://auscillate.com