At what quality level does Six Sigma operate as suggested by Smith?

Six Sigma operates at a quality level that is characterized by a significant reduction in defects in processes. Specifically, Six Sigma aims for a performance level of 3.4 defects per million opportunities, which corresponds to a process being operated at the 6 Sigma level.

While the choices present different sigma levels, the notion that Six Sigma is associated with 4 sigma levels misses the mark regarding its core definition. A Six Sigma process reflects a comprehensive integration of quality management techniques that drive down variability and enhance product quality.

Thus, the highlighted sigma level of 6 signifies a mature quality system where the emphasis is on minimizing variation and achieving an extraordinary level of quality, which translates to the fewest defects possible, supporting the premise that Six Sigma operates effectively at this level.