MRB

Core meaning

MRB commonly refers to the **Material Review Board**: a formal, cross‑functional team and process used to evaluate and disposition nonconforming material, parts, or product.

In industrial and especially regulated manufacturing environments, MRB is both:

– **An organizational body** (the board or team)
– **A controlled process** (the workflow and records used to review and disposition nonconformances)

Typical composition and scope

An MRB typically includes representatives from:

– Quality assurance / quality engineering
– Manufacturing or operations engineering
– Production / shop floor supervision
– Design or product engineering (for form/fit/function decisions)
– Supply chain or purchasing (for supplier‑related issues)

The MRB process generally covers:

– Review of nonconformances or defects
– Technical assessment of risk to safety, performance, or compliance
– Determination of allowed **dispositions** (e.g., rework, repair, use‑as‑is with justification, scrap, return to supplier)
– Documentation and approval of the decision with traceability
– Feedback into corrective and preventive actions (CAPA), change control, or supplier management

MRB process in operations

Within day‑to‑day operations, MRB is typically triggered when a part, assembly, batch, or document:

– Fails inspection or test
– Deviates from drawing, specification, or defined process
– Is suspected to be nonconforming due to supplier notification or internal investigation

In many plants, an MRB record or ticket is created in a quality management system (QMS), MES, or ERP, then routed for review. The MRB team evaluates:

– Nonconformance description and classification
– Affected configuration or serial numbers
– Applicable requirements (drawings, specifications, procedures)
– Historical occurrences and similar MRB cases

The outcome is a documented disposition and, when appropriate, linkage to:

– Deviation/waiver requests
– Engineering change requests
– Root cause analysis and CAPA
– Supplier corrective action

Boundaries and exclusions

When used in this manufacturing context, **MRB does not refer to**:

– General quality review meetings that do not include formal nonconformance disposition authority
– Safety review boards or risk committees, unless they are explicitly chartered as the MRB for nonconforming material
– Financial or budgeting “review boards” unrelated to material nonconformances

Some organizations also use “MRB” informally to describe the **physical location** where nonconforming material is quarantined and held for review. Strictly speaking, this is shorthand; the core concept is the **governed review and disposition process**.

Common confusion

MRB is often confused with or conflated with related concepts:

– **NCR (Nonconformance Report)**: the record that describes a nonconformance. The NCR is usually **input** to MRB; the MRB decision is the **output**.
– **CAPA (Corrective and Preventive Action)**: the structured problem‑solving process. MRB may **trigger** CAPA but is not itself a full CAPA process.
– **Deviation / concession / waiver**: a controlled permission to depart from requirements. MRB decisions frequently rely on or create these, but they are distinct artifacts.

In regulated industries, MRB authority and membership are often defined in procedures. Misuse of the term to describe ad‑hoc decisions without formal authority or documentation can cause confusion during internal or external reviews.

Site context: MRB in MES, analytics, and risk

In environments using MES and integrated quality systems, MRB events and records commonly appear as:

– Nonconformance or quality hold transactions
– Disposition codes (rework, repair, scrap, use‑as‑is)
– Links between work‑in‑process, inspection results, and MRB decisions

For operations intelligence and risk analysis (for example, analyzing aircraft availability or AOG risk), MRB data can be used to:

– Quantify the frequency and severity of nonconforming material
– Analyze typical rework and repair cycle times driven by MRB
– Identify patterns where MRB decisions correlate with schedule slippage or downstream defects

In such usage, MRB remains the formal decision process around nonconforming material; analytics consume its data but do not change its definition.