Which statement best describes DMAIC vs DMADV in Six Sigma?

Which statement best describes DMAIC vs DMADV in Six Sigma?

• A. DMAIC redesigns new processes; DMADV improves existing processes.
• B. DMAIC focuses on design of new products; DMADV on process improvement.
• C. DMAIC and DMADV are interchangeable.
• D. DMAIC improves existing processes; DMADV designs new processes or products.

Answer: (D)

In Six Sigma, two different paths are used for different goals. DMAIC is a problem-solving cycle aimed at improving an existing process by identifying root causes of variation, then implementing changes and putting controls in place. It follows Define, Measure, Analyze, Improve, and Control. DMADV, on the other hand, is used when you need to design something new—a new process or product—or rebuild a current one to meet targets that the existing setup cannot achieve. It follows Define, Measure, Analyze, Design, and Verify, with verification ensuring the new design will perform as required before full deployment. The statement that DMAIC improves existing processes while DMADV designs new processes or products captures this distinction. The other options mix up the roles, suggest they're interchangeable, or claim the focus is reversed, which doesn’t fit how these two paths are intended to be used.

In Six Sigma, two different paths are used for different goals. DMAIC is a problem-solving cycle aimed at improving an existing process by identifying root causes of variation, then implementing changes and putting controls in place. It follows Define, Measure, Analyze, Improve, and Control.

DMADV, on the other hand, is used when you need to design something new—a new process or product—or rebuild a current one to meet targets that the existing setup cannot achieve. It follows Define, Measure, Analyze, Design, and Verify, with verification ensuring the new design will perform as required before full deployment.

The statement that DMAIC improves existing processes while DMADV designs new processes or products captures this distinction. The other options mix up the roles, suggest they're interchangeable, or claim the focus is reversed, which doesn’t fit how these two paths are intended to be used.