If you've ever been gridlocked in a group decision-making process, you know how quickly things can go from frustrating to downright unwieldy. Even with a common goal in mind, it's easy to get bogged down in data and competing opinions. Analysis of Competing Hypothesis (ACH) is an open source application that's been helping the CIA with its research methodologies for years and it's freely available to the public to help groups look at -- and solve -- problems objectively.