Material Review Board
What event triggers an MRB review in an ERP-integrated quality system?
An MRB review is triggered when a nonconformance is discovered in incoming material, work-in-progress, finished goods, or supplier parts and documented as a nonconformance report (NCR). The affected lot is then quarantined and flagged in the ERP/MES until the board assigns a disposition.
Who are the required members of a Material Review Board and why is cross-functionality critical?
Typical members are quality assurance, manufacturing engineering, design engineering, supply chain, and supplier quality. Cross-functionality prevents a single function from issuing an unsafe disposition and ensures decisions consider functional requirements, manufacturability, supplier contracts, and inventory impact.
How does MRB disposition data integrate with inventory control and traceability systems?
MRB dispositions are recorded against the originating NCR with signoffs, and the ERP/MES/WMS status remains blocked until the decision is applied. This prevents nonconforming stock from being issued, keeps inventory records aligned with physical hold condition, and maintains a documented audit trail for quality and compliance.
The Material Review Board (MRB) is a formal cross-functional team in manufacturing and quality systems that reviews nonconforming or suspect material and assigns a controlled disposition such as rework, scrap, use-as-is, regrade, or return to vendor. It keeps quarantined parts from normal flow until engineering, quality, manufacturing, and supply chain agree and document the decision.
On the shop floor, an operator or inspector identifies a defect, opens an NCR, and the affected material is segregated and marked so it cannot be consumed. The MRB reviews the failure with representatives from quality, manufacturing engineering, design engineering, supplier quality, and operations, then decides whether the item can be reworked, scrapped, used as-is, or returned to the supplier. In ERP/MES/WMS, the material remains blocked under hold-and-release control until the disposition is recorded, preserving traceability and preventing accidental issue. For raw material, incoming lots that fail receiving inspection are reclassified, reworked, rejected, or closed under deviation control based on the board's decision. This reduces scrap and rework by making fast, accountable decisions while maintaining signoff. This is how the MRB acts as a decision gate between physical quarantine and system availability, keeping inventory records aligned with what is actually usable.
Quarantine bottleneck: Held lots pile up at receiving or line-side storage when disposition decisions lag, consuming rack space and choking throughput because the MRB lacks a steady cadence or clear ownership.
Unauthorized use of held material: If ERP/MES status is not locked, operators can pull a quarantined lot into production, breaking traceability and risking customer escapes or recall.
Premature use-as-is disposition: Approving use-as-is or rework without failure analysis embeds hidden defects, causing repeat nonconformance and scrapping parts after value has already been added.