This document provides an overview and examples of problem solving tools including 5Whys, brainstorming, and Corrective and Preventive Action (CAPA). It describes the 5Whys methodology for problem solving using who, what, when, where, why and how questions. An example applies the 5Whys to a fire incident at an office. Brainstorming is introduced as a tool for generating ideas and solutions without criticism. Different types of brainstorming are also outlined. Finally, CAPA is defined as actions taken to eliminate causes of nonconformities and prevent future issues. An example case is presented on applying CAPA.