Which tool cannot help you determine CTQ requirements?

The Fishbone Diagram, also known as the cause-and-effect diagram, is primarily used for identifying potential causes of a problem rather than directly determining Critical to Quality (CTQ) requirements. While it is an effective tool for root cause analysis and problem-solving, it does not specifically focus on capturing the voice of the customer (VOC) or translating customer needs into measurable requirements.

Surveys, on the other hand, are directly aimed at gathering customer feedback and understanding their needs, making them valuable for identifying CTQ requirements. Likewise, VOC Translation is designed to convert customer expectations into specifications that can be measured and managed, making it a crucial part of defining CTQ. Brainstorming can also ideate potential CTQs, as it encourages diverse thinking and the generation of ideas, but it is not a structured method for determining specific requirements.

In this context, while the Fishbone Diagram serves an important function in quality management, its role does not extend to directly establishing CTQs, which makes it the correct choice in this scenario.