MRB workflow

An MRB workflow is the controlled process used to review, evaluate, and disposition nonconforming material in a manufacturing or maintenance environment. MRB usually stands for Material Review Board or Materials Review Board, depending on company usage.

In industrial quality systems, an MRB workflow commonly starts when a part, assembly, batch, or document is identified as nonconforming. The workflow typically records the issue, contains or segregates the affected item, routes the record to authorized reviewers, captures technical and quality input, and records a disposition decision.

Common dispositions include rework, repair, use-as-is, scrap, return to supplier, or further investigation. The exact options and approval roles depend on the organization, product type, customer requirements, and applicable quality procedures.

MRB workflow should not be confused with corrective action alone. MRB focuses on the immediate disposition of a specific nonconforming item or lot. CAPA, RCCA, or 8D activities may follow when the issue requires root cause analysis or systemic corrective action.

In MES, QMS, ERP, or supplier quality systems, an MRB workflow is often represented as a routed electronic record linked to nonconformance reports, inspection results, inventory status, traceability records, and disposition approvals.