The Better way to Excellent results and Success through the application of an appropriate Tool (BEST)-method is a universal approach to identifying the characteristics of a process that delivers excellent results. The BEST-tool is, as far as the authors know, the only method that provides a measure for the degree of excellence of a Best Practice. Human Synergistics developed a method to measure these thinking styles. There are basically two different thinking styles: defensive and constructive. The original Capability Maturity Model was a roadmap of Best Practices in software engineering accompanied with Best Practices in project and organizational management required to sustain them. The Plan-Do-Check-Act-cycle is a simple approach to address corrective action in the workplace. This model encourages observation and planning to identify the root cause of an error, plan a response, pilot the solution, measure the results, and then document the changes and new processes to hold the gains.