What tool is most commonly used in dmaic define phase?

In the DMAIC Define phase, the most commonly used tool is the SIPOC diagram. SIPOC stands for Suppliers, Inputs, Process, Outputs, and Customers, and it helps teams visualize and understand the high-level elements of a process. This tool aids in defining the project scope, identifying key stakeholders, and clarifying the process to be improved. Additionally, it provides a clear framework for gathering customer requirements and understanding the overall context of the project.