Six Sigma is commonly associated with which metric or concept?

Six Sigma is commonly associated with which metric or concept?

• A. Sigma level
• B. Net Promoter Score
• C. Customer satisfaction
• D. Return on investment

Answer: (A)

Six Sigma centers on reducing process variation and defects, quantified by the sigma level. The sigma level shows how many standard deviations the process output is from the defect threshold; aiming for six sigma means very few defects, roughly 3.4 per million opportunities. This metric is the core way Six Sigma measures process capability and guides improvement efforts within methods like DMAIC. The other metrics—Net Promoter Score, customer satisfaction, and return on investment—are useful business indicators but do not define or measure Six Sigma performance. Sigma level is the key concept that directly reflects Six Sigma achievement.

Six Sigma centers on reducing process variation and defects, quantified by the sigma level. The sigma level shows how many standard deviations the process output is from the defect threshold; aiming for six sigma means very few defects, roughly 3.4 per million opportunities. This metric is the core way Six Sigma measures process capability and guides improvement efforts within methods like DMAIC. The other metrics—Net Promoter Score, customer satisfaction, and return on investment—are useful business indicators but do not define or measure Six Sigma performance. Sigma level is the key concept that directly reflects Six Sigma achievement.