Taking a Define-Measure-Analyze-Improve-Control (DMAIC) approach to performing causal analysis enables a structured, problem solving framework in which to address issues and analyze improvements as organizations move toward CMMI High Maturity. Six Sigma’s DMAIC facilitates a systematic method for using data to evaluate performance improvements. This presentation will show how the DMAIC approach informs the causal analysis process when tackling both a “simple” and a more complex challenge. We will also be exploring advanced statistical techniques such as hypothesis tests, to measure the impact of process changes and subsequent performance gains.