Explanation
Tracing the requirements for the interaction between a customer and the new online ordering system will enable the business analyst (BA) to illustrate the relationships between relevant requirements. According to the BABOK Guide, requirement traceability is "the ability to track the origin and evolution of a requirement and its relationship to other requirements" 3. By tracing the requirements, the BA can show how the requirements are aligned with the business objectives, how they support each other, and how they affect the scope, quality, and risk of the solution. Showing all of the decision points in the business process, capturing all users that will be impacted by the project, and detailing the inner workings of the system being changed are possible outcomes of tracing the requirements, but they are not the primary purpose of the technique. References: 3:
BABOK Guide, Version 3, Section 7.6 Trace Requirements