Identify one key technique used in the Requirements Analysis and Design Definition knowledge area.

The correct choice, process modeling, is an essential technique used in the Requirements Analysis and Design Definition knowledge area as outlined in the BABOK. Process modeling helps business analysts visualize and document the processes that will be affected by or contribute to the requirements of a project. By creating representations of business processes, analysts can identify inefficiencies, redundancies, and areas for improvement.

This technique allows stakeholders to gain a clearer understanding of how the requirements integrate into the existing processes, facilitating better communication and alignment among different teams. Additionally, process modeling helps in validating requirements against the intended business outcomes and ensuring that the design solutions appropriately address the needs of the business.

In contrast, budget forecasting, time management, and vendor selection are not primarily focused on the analysis and definition of requirements or the design development. Budget forecasting is concerned with financial planning, time management focuses on scheduling and resource allocation, and vendor selection deals with choosing suppliers or partners. While these elements can play a role in the overall project management process, they do not serve as key techniques specifically within the context of Requirements Analysis and Design Definition.