The AIAG Effective Problem Solving Practitioner Guide provides the latest automaker thinking on root cause analysis and effective problem solving. It focuses on the process and the roles of the problem solving team members to resolve difficult problems. It provides guidance for which quality tools are most effective at each stage of the process but it does not provide detailed explanations of each. This Guide was developed in response to concern expressed by automakers and suppliers about the ability within the industry to prevent problem recurrence. In fact, at the time of publication, corrective action (Clause 8.5.2) is the top cause of ISO TS/16949 major non conformities issued by certification bodies globally. This Practitioner Guide, along with the AIAG Effective Problem Solving Leader Guide defines what must be done by an organization to address this concern