Final answer:
Six Sigma is a statistical quality management methodology that uses tools and techniques for business process improvement. It aims to reduce defects and improve efficiency and is applicable across various industries, not just manufacturing.
Step-by-step explanation:
Six Sigma is a comprehensive and flexible system for achieving, sustaining and maximizing business success. It is uniquely driven by a close understanding of customer needs, disciplined use of facts, data, and statistical analysis, and diligent attention to managing, improving, and reinventing business processes.
Option 1 is somewhat accurate; Six Sigma does include a strong statistical approach to process improvement. Option 2 is also correct; it is indeed a quality management methodology that focuses on reducing defects and improving efficiency. Option 3 is right as well; Six Sigma uses various tools and techniques for measuring and analyzing data related to business processes. However, Option 4 is incorrect; Six Sigma is applicable to a wide range of industries, not just manufacturing.
Thus, the most comprehensive response would be that Six Sigma is a statistical quality management methodology that incorporates a set of tools and techniques for improving business processes across various industries.