Customer Approval

Customer approval commonly refers to formal confirmation from a customer that a product, service, document, or change meets agreed requirements before it is released, used, or implemented. In regulated and industrial manufacturing environments, it is a controlled step in which the customer reviews specified outputs and provides documented acceptance.

What customer approval typically includes

Customer approval usually involves one or more of the following:

• Approval of engineering drawings, specifications, or models before production
• Approval of first article inspection (FAI) reports, sample parts, or prototypes
• Approval of quality plans, control plans, or inspection strategies
• Approval of process changes, deviations, or concessions affecting fit, form, or function
• Approval of key documents such as work instructions, test methods, or certificates when required by contract

The approval is typically recorded via signatures (wet or electronic), workflow statuses in QMS/MES/PLM/ERP systems, or acknowledgements in customer portals.

Operational meaning in manufacturing

In day-to-day operations, customer approval is often a defined step in:

• New product introduction (NPI): Customers may approve design outputs, FAIs, or process capability data before recurring production.
• Change control: Engineering changes, material substitutions, or process modifications may require customer approval when they affect contractual or regulatory requirements.
• Nonconformance handling: Deviations, concessions, or waivers for parts outside specification may be sent to the customer for disposition and formal approval.
• Document control: Certain documents are not released to production or shipment until customer-approval status is recorded in the document-control or PLM system.

Manufacturers typically define when customer approval is required in contracts, purchase orders, quality agreements, or customer-specific procedures, and then mirror these rules in their internal workflows and system configurations.

Evidence and traceability

Because customer approval can be critical for compliance and audit trails, organizations commonly:

• Store signed documents, emails, or portal confirmations as controlled records
• Link approval records to specific part numbers, revisions, work orders, or lots
• Capture approval dates, responsible individuals, and any conditions or limitations
• Make approval status visible to planning, purchasing, and shop-floor systems to prevent unapproved release

Common confusion

• Customer approval vs. internal approval: Internal approvals (by engineering, quality, or management) are within the manufacturer. Customer approval involves the external customer and is driven by contractual or regulatory requirements.
• Customer approval vs. customer satisfaction: Approval is a discrete, documented decision on a defined item (for example, a drawing or FAI). Customer satisfaction is a broader perception of performance over time.
• Customer approval vs. regulatory approval: Customer approval comes from the buying organization. Regulatory approval comes from authorities or notified bodies and follows separate processes.

Relationship to quality and compliance

Customer approval is closely tied to quality management and traceability. It supports:

• Clear evidence that contractual and technical requirements were reviewed and accepted
• Control of changes that could affect safety, performance, or compliance
• Alignment between customer requirements and internal process controls captured in MES, QMS, PLM, and ERP systems

While practices vary by sector and customer, treating customer approval as a controlled, traceable step helps ensure that production and delivery only proceed under conditions that the customer has explicitly accepted.