Implementing a requirements traceability matrix (RTM) is the most effective way for the project manager to ensure that each requirement is linked to business and project objectives. An RTM is a tool that maps out the relationship between requirements and project work, ensuring that predetermined project requirements are met and providing a record of any testing, issues, and completed items. This approach helps in keeping the project aligned with its objectives and facilitates the tracking of requirements throughout the project lifecycle123.
References: = Information on RTMs from Project-Management.com1, PMI.org2, and ProjectManager.com3. Additionally, techniques for linking business analysis plans to organizational strategy as found in the BABOK Guide4.