You are the business analyst for your organization.

A plan-driven approach to business analysis is a methodology that focuses on minimizing up-front uncertainty and ensuring that the solution is fully defined before implementation begins in order to maximize control and minimize risk. This approach tends to be preferred in situations where requirements are stable and clear, and where changes are costly and disruptive. Therefore, a plan-driven approach has the most business analysis work at the beginning of the project or during the start of a project phase, as it involves detailed planning, analysis, and documentation of the requirements and the solution. A plan-driven approach also requires formal approval and sign-off of the requirements and the solution before moving to the next phase123. References: 1: How to Choose the Right Business Analysis Approach1 2: Plan driven projects versus change driven2 3: Business Analysis Methodology3