A: Six Sigma methodology is a data-driven approach organizations use to improve business processes and reduce defects or errors. Motorola first developed it in the 1980s, and many other companies have widely adopted it.

The goal of Six Sigma is to minimize variation in processes and achieve a high level of quality and efficiency. The methodology combines statistical analysis and problem-solving techniques to identify and eliminate the root causes of defects and errors.

The Six Sigma methodology follows a structured problem-solving framework called DMAIC, which stands for Define, Measure, Analyze, Improve, and Control. This framework guides organizations through identifying opportunities for improvement, collecting and analyzing data, implementing solutions, and monitoring and sustaining the improvements.

Six Sigma also uses tools and techniques such as process mapping, statistical analysis, root cause analysis, and control charts to analyze and improve processes. The methodology emphasizes the importance of data-driven decision-making and the involvement of all stakeholders in the improvement process.