Which tool is commonly used in the DMAIC define phase?

In the DMAIC define phase, a commonly used tool is the SIPOC diagram, which stands for Suppliers, Inputs, Process, Outputs, and Customers. This visual tool helps teams map out the entire process, identify key stakeholders, and clarify the project scope. By outlining these elements, teams can better understand the current state and define the problem they aim to address. Other tools like project charters and voice of the customer (VOC) analysis may also be used to further refine the problem statement.