When a Six Sigma project sponsor uses a gate review checklist during the Control Phase,...

In the Control Phase, the purpose of a gate review is to verify that the project gains can be sustained after closure. CSSBB materials emphasize that control activities must demonstrate compliance and control before the project is closed, and that the control plan should remain a living document so the benefits of the project are fully realized. They also identify sustainment elements such as documentation, ongoing evaluation, training deployment, and lessons learned. That makes “documentation and measures prepared for sustainability” the best choice for a sponsor’s Control Phase checklist. By this point in DMAIC, the project should already have completed root cause work and solution development, so options involving pilot testing, root cause analysis, or process mapping are more characteristic of earlier phases. In contrast, the sponsor at Control is looking for evidence that ownership has been transferred, documentation is complete, key performance measures are in place, and sustainment mechanisms will prevent regression. Therefore, the correct answer is the pair focused on documentation and measures for sustainability, because that directly reflects the objectives of Control Phase closure and long-term benefit preservation.

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