This book provides a conceptual description of the PDCA cycle and the tools that support it. A brief literature review is given for each tool, indicating the timeline according to Scopus, the main areas in which they are applied, the main authors and the journals that most publish on these topics. It reports three industrial applications, one focusing on cost reduction, the second on optimizing a manufacturing company's raw material receiving process, and the third one on eliminating waste and increasing performance.