This document provides an overview of problem analysis techniques. It discusses identifying the problem, specifying it in terms of identity, location, timing and magnitude. It also covers investigating the problem by looking at distinctions and changes between what is and is not occurring. The final stages discussed are testing the most probable cause by matching it to the observed effects through logic, and then verifying the likely cause independently proves it produced the observed effect. Problem analysis provides a systematic approach to explaining situations where expected performance is not being achieved and the cause is unknown.