Which CNCF maturity sequence is correct?

Which CNCF maturity sequence is correct?

• A. Sandbox, Graduated, Incubated
• B. Incubated, Sandbox, Graduated
• C. Sandbox, Graduated, Incubated
• D. Sandbox, Incubated, Graduated

Answer: (D)

The question tests how CNCF projects progress through maturity levels from early experimentation to full production readiness. Projects start in Sandbox, a space for experimentation and community feedback where strict production standards aren’t yet required. As they prove stability, governance, and a sustainable release process, they move into Incubated, which brings clearer expectations for maintainers, testing, security practices, and governance. When a project demonstrates broad adoption, robust governance, and reliable production use, it can graduate, signaling a mature, stable option with formal processes in place. Therefore, the correct sequence is Sandbox, Incubated, then Graduated. The other sequences don’t reflect the required progression, as they either place a more mature stage before a less mature one or skip a stage entirely.

The question tests how CNCF projects progress through maturity levels from early experimentation to full production readiness. Projects start in Sandbox, a space for experimentation and community feedback where strict production standards aren’t yet required. As they prove stability, governance, and a sustainable release process, they move into Incubated, which brings clearer expectations for maintainers, testing, security practices, and governance. When a project demonstrates broad adoption, robust governance, and reliable production use, it can graduate, signaling a mature, stable option with formal processes in place. Therefore, the correct sequence is Sandbox, Incubated, then Graduated. The other sequences don’t reflect the required progression, as they either place a more mature stage before a less mature one or skip a stage entirely.