MRB

Material Review Board (MRB) is a cross‑functional committee responsible for evaluating nonconforming materials, components, or processes and determining their disposition. The MRB typically includes representatives from quality assurance, manufacturing, design engineering, procurement, and inspection, and may involve supplier quality or reliability specialists depending on the organization.

When a nonconformity is detected, a nonconformance report (NCR) or defect report is generated and routed to the MRB. The board reviews the report, assesses the impact on safety, fit, function, and form, and considers regulatory and contractual requirements. The MRB then approves a disposition and, if needed, authorizes rework, repair, or other actions. Dispositions commonly include use as is with concession, rework or repair to bring the item into specification, or scrap. In some cases, items may be returned to a supplier or held for further investigation.

Disposition decisions are documented in the NCR and related quality records, along with rationale, any required rework instructions, and validation testing plans. The MRB also helps ensure that approved concessions do not introduce unacceptable risk and that traceability and accountability are maintained.

In manufacturing and aerospace, the MRB operates within broader quality management systems and standards, such as ISO 9001 and, in aviation-related industries, AS9100, which require formal handling of nonconforming products and thorough recordkeeping. While MRB most commonly refers to Material Review Board, the acronym can have other meanings in different sectors.