Requirements inspections are a formal process for identifying defects in software requirements documents. It involves individual review followed by a team review meeting led by a moderator. Key roles include author, reader, tester, and moderator. The goal is to find defects in requirements before they can lead to problems in design and testing. Studies show requirements inspections can find 60-90% of defects and reduce costs from rework. The process includes planning, individual review, team meeting, defect resolution, and validation. Metrics are collected on defects found and author response to drive continuous improvement. Management oversees planning and results but does not participate directly in inspections.