MRB (Material Review Board)

Core meaning

MRB (Material Review Board) is a cross-functional group formally assigned to review, assess, and disposition nonconforming material, components, or finished products. It operates under defined procedures to decide what happens to material that does not meet specified requirements.

In industrial and regulated manufacturing environments, the MRB commonly includes representatives from quality, engineering, production, and sometimes supply chain or regulatory/compliance functions.

Typical responsibilities

An MRB process commonly includes:

– **Reviewing nonconformances**: Evaluating nonconforming material identified through inspections, in-process checks, or customer returns.
– **Root cause input**: Providing technical and quality perspectives to support or trigger root cause analysis by appropriate teams.
– **Disposition decisions**: Assigning an allowed path forward for the material, such as:
– Use as is (with justification and documentation)
– Rework or repair
– Regrade or downgrade
– Scrap or destroy
– Return to supplier
– **Risk and compliance assessment**: Considering safety, reliability, regulatory, and contract requirements before disposition.
– **Documentation**: Ensuring that decisions and justifications are documented in the applicable quality or manufacturing systems.

How MRB is used in manufacturing workflows

In many plants, MRB activity is integrated into quality and production workflows as follows:

– Nonconforming material is **quarantined** or placed on **hold** (often in an MES, QMS, or ERP system) and physically moved to a designated area.
– A **nonconformance record** is created, including defect description, lot or batch data, and inspection results.
– The MRB team reviews the record, may request additional tests or inspections, and then records a **disposition** in the system.
– The chosen disposition drives **subsequent system actions**, such as:
– Updating inventory status
– Generating rework orders
– Triggering supplier corrective actions
– Linking to CAPA or other corrective action processes

In regulated industries (e.g., pharmaceuticals, medical devices, aerospace), MRB decisions are typically subject to strict documentation, traceability, and retention requirements.

Boundaries and what MRB is not

– **Not the same as general quality control**: MRB is a specific, formal decision process for nonconforming material, not all routine inspections or tests.
– **Not always a standing physical committee**: In some organizations, MRB is a virtual or workflow-defined role set, but the function is still recognized as “the MRB.”
– **Not a full root cause investigation process**: MRB may initiate or request investigations, but detailed root cause analysis and CAPA activities are usually managed through separate processes.

Common variations and terminology

Terms and structures that are closely related include:

– **Material Review**: The process or activity; MRB is the governing body or function.
– **MRB disposition**: The documented outcome (e.g., scrap, rework) resulting from the MRB review.
– **Nonconforming material review**: Sometimes used interchangeably with MRB activity.

Some organizations use MRB for **both incoming and in-process material**, while others maintain separate boards or processes (e.g., Supplier MRB vs. internal MRB).

Relation to quality and risk management

MRB is a key control point in quality management systems because it:

– Provides a structured path to prevent unintended use of nonconforming material.
– Links inspection and deviation records to downstream actions like rework orders or supplier feedback.
– Supports traceability and auditability of how nonconformances were handled.

It often interfaces with:

– **QMS**: For nonconformance, deviation, and CAPA records.
– **MES/ERP**: For inventory status, work order updates, and material traceability.
– **Risk management processes**: For assessing potential impact on product performance, safety, or compliance when deciding to use as is, rework, or scrap.

Common confusion and misuse

– **MRB vs. NCR (Nonconformance Report)**: The NCR is the record describing the issue. The MRB is the body or function that reviews the nonconforming item and decides the disposition recorded on that NCR.
– **MRB vs. CAPA**: MRB focuses on the immediate handling of the nonconforming material. CAPA addresses systemic causes and long-term corrective and preventive actions.
– **MRB vs. Material Review Board in non-manufacturing contexts**: In some non-industrial settings, “material review” might mean document or content review. In manufacturing and industrial operations, MRB almost always refers to nonconforming physical materials or products.