Supplier Corrective Action Request (SCAR)

A Supplier Corrective Action Request (SCAR) is a formal document issued by a customer to a supplier, asking the supplier to investigate a detected nonconformance, identify its root cause, implement corrective and preventive actions, and report back on the results. In industrial and regulated manufacturing environments, SCARs are a core part of supplier quality management and are often tied to internal corrective action and CAPA processes.

What a SCAR typically includes

While formats vary by organization, a SCAR commonly includes:

• Reference information such as SCAR number, date, and responsible contacts
• Description of the problem, including part numbers, lot/batch information, and affected quantities
• Evidence of the nonconformance, such as inspection results, test data, or defect records
• Requested response timing and containment expectations
• Sections for the supplier to document containment actions, root cause analysis, corrective actions, and preventive actions
• Customer review and approval or rejection of the supplier’s response

How SCARs are used operationally

Operationally, SCARs connect supplier performance with internal quality and production processes. Typical uses include:

• Triggering immediate containment, such as quarantining suspect incoming lots or stopping use of a component on the line
• Driving structured root cause analysis by the supplier, often using methods like 5 Whys, fishbone diagrams, or failure mode analysis
• Documenting planned and completed corrective actions, such as process changes, operator training, or inspection updates
• Capturing preventive actions that aim to avoid recurrence, such as design-for-quality changes or improved supplier process controls
• Feeding metrics for supplier performance dashboards, supplier scorecards, or supplier risk assessments

In many plants, SCARs are managed within a quality management system (QMS), supplier quality module, or integrated MES/ERP environment. SCAR records may be linked to nonconformance reports, incoming inspection data, purchase orders, and, in regulated industries, to broader CAPA or change control records.

SCARs in regulated and audited environments

In regulated manufacturing sectors, SCARs commonly serve as documented evidence that supplier-related nonconformances are being formally investigated and addressed. Auditors may review SCAR histories to understand:

• How supplier nonconformances are identified and escalated
• Whether root cause analyses are documented and traceable
• How effectiveness of corrective and preventive actions is verified
• How lessons learned are communicated internally and to suppliers

SCARs can also support traceability and risk management by providing a record of which lots, components, or services were affected and how they were handled operationally.

Common confusion

• SCAR vs. CAPA: A SCAR is a specific request directed to a supplier. CAPA (Corrective and Preventive Action) is a broader process used within an organization to address systemic issues. A SCAR may be one output or component within an internal CAPA.
• SCAR vs. Nonconformance Report (NCR): An NCR documents that a nonconformance has been found. A SCAR is a follow-up request to the supplier to investigate and resolve that nonconformance. An NCR can exist without a SCAR if the issue is handled internally.
• SCAR vs. Supplier complaint: Informal complaints or feedback may not require a structured investigation. A SCAR is a formal, traceable request that typically expects documented root cause and action plans.

Link to manufacturing workflows

Within manufacturing operations, SCARs may be initiated by incoming inspection, production, or field quality when a defect is traced to a supplier. Typical workflow touchpoints include:

• Integration with incoming goods inspection to automatically trigger SCAR creation for repeated or critical defects
• Linking SCARs to production holds, rework records, or scrap transactions in MES or ERP systems
• Capturing supplier responses and approvals in a controlled document or record, aligned with document control procedures
• Feeding supplier risk rankings and decisions about dual-sourcing, qualification, or additional controls