Six Sigma is a set of techniques and tools for process improvement. It is a data-driven approach used to identify and eliminate defects in any process. Six Sigma is based on the idea that if a process is measured and controlled, it will produce better results. The goal of Six Sigma is to reduce variation and improve the quality of products and services. Six Sigma is used in maintenance operations and management to identify and eliminate defects in processes, improve efficiency, and reduce maintenance costs. It is a systematic approach to problem-solving that uses data-driven methods to identify root causes of problems and develop solutions. Six Sigma is used to improve customer satisfaction, reduce waste, and increase profitability.