Validating the requirements is a key activity to reduce the risk of rework, especially for a project with a tight timeline and a lean budget. Validating the requirements means ensuring that they are aligned with the business needs, objectives, and expectations of the stakeholders, and that they are clear, complete, consistent, feasible, and testable. Validating the requirements can help the business analyst and the project team to identify and resolve any errors, gaps, conflicts, or ambiguities in the requirements before they are implemented, and to avoid any unnecessary changes or rework later in the project lifecycle. References: PMI Professional in Business Analysis (PMI-PBA)® Examination Content Outline1, page 20; Business Analysis for Practitioners: A Practice Guide2, page 100.