Six Sigma is a data-driven approach and methodology for eliminating defects in any process—from manufacturing to transactional and from product to service. The fundamental objective of Six Sigma is to implement a measurement-based strategy that focuses on process improvement and variation reduction through the application of Six Sigma improvement projects. This method uses statistical tools to identify the causes of defects and eliminate them, ensuring that processes consistently produce results that are as close to perfection as possible. Six Sigma helps companies increase efficiency, improve quality, and reduce costs, thereby enhancing customer satisfaction and profitability.