Approved Supplier List (ASL)
Quick facts
| Category | Authoritative record of qualified suppliers |
|---|---|
| Used by | Manufacturing, medical devices, pharmaceuticals, aerospace, automotive and other regulated industries |
| Also called | ASL, AVL (Approved Vendor List) |
| Related standards | ISO 9001, ISO 13485, AS9100, IATF 16949 |
| Related processes | Supplier evaluation, supplier audit, purchasing software, quality agreement |
| Semantic match | approved supplier list, ASL, approved vendor list, qualified supplier record |
What is Approved Supplier List (ASL)?
An approved supplier list is the controlled, authoritative record identifying which suppliers an organization has qualified to provide specific materials, components or services. Rather than allowing purchasing to source from any available vendor, the ASL restricts sourcing to suppliers that have already demonstrated they meet the organization's quality and performance requirements.
Suppliers are typically added to the ASL following an initial evaluation, which may include a review of certifications, a supplier survey, or a formal supplier audit depending on the risk and criticality of what they provide. The ASL often specifies which specific materials or services each supplier is approved to provide, rather than a blanket approval covering everything a supplier offers.
Maintaining the ASL is an ongoing responsibility, since supplier approval can be affected by declining performance, expired certifications, or other changes that warrant re-evaluation or removal from the list.
Why is Approved Supplier List (ASL) important?
Restricting purchasing to an approved supplier list prevents materials from unqualified or unvetted vendors from entering production, reducing the risk of quality issues traced back to insufficiently evaluated suppliers.
Maintaining an accurate, current ASL supports regulatory compliance, since auditors commonly review whether purchasing decisions were actually limited to approved suppliers and whether the list itself reflects up-to-date evaluation status.
An ASL also supports more efficient purchasing decisions, since buyers can quickly identify qualified sourcing options without needing to independently vet a vendor's credentials for every purchase.
How does Approved Supplier List (ASL) work?
A typical approved supplier list process includes:
- Qualification criteria. Define what evaluation a supplier must pass to be added to the list.
- Initial evaluation. Assess a prospective supplier through certification review, survey or audit.
- List addition. Add the supplier to the ASL, specifying approved materials or services.
- Purchasing restriction. Limit sourcing decisions to suppliers on the current ASL.
- Ongoing monitoring. Track supplier performance and certification status over time.
- Re-evaluation or removal. Update, re-qualify or remove suppliers as circumstances change.
Approved Supplier List vs. Supplier Evaluation
| Comparison | Approved Supplier List | Supplier Evaluation |
|---|---|---|
| Nature | A record of qualified, approved suppliers | The process used to assess and qualify suppliers |
| Relationship | Reflects the outcome of supplier evaluation | Determines whether a supplier is added to the ASL |
Real-world examples of Approved Supplier List (ASL)
A manufacturer's purchasing system prevents a buyer from creating a purchase order for a component supplier not currently on the approved supplier list, enforcing sourcing discipline automatically.
A medical device company removes a supplier from its ASL after the supplier's ISO 13485 certification lapses, requiring re-qualification before purchasing can resume.
An aerospace manufacturer reviews its ASL annually, confirming that supplier certifications remain current and that performance data continues to support each supplier's approved status.
Regulations and standards related to Approved Supplier List (ASL)
ISO 9001 Clause 8.4 requires organizations to determine and apply criteria for supplier evaluation and selection and to retain documented information about these evaluations, which the ASL directly supports as the record of which suppliers have met those criteria.
ISO 13485, AS9100 and IATF 16949 place similar or stronger emphasis on maintaining a controlled, current list of approved suppliers, particularly for critical components in medical device, aerospace and automotive supply chains.
Required by
How QT9 helps with Approved Supplier List (ASL)
QT9 QMS and ERP capabilities supporting the approved supplier list
- Maintain a live, searchable directory of all approved suppliers.
- Link supplier evaluation results directly to ASL status.
- Automatically flag or restrict purchasing from suppliers not currently approved.
- Track certification expiration dates with automated alerts.
- Connect ASL status to supplier scorecards and performance data.
- Maintain a complete history of supplier approvals, re-evaluations and removals.
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Common mistakes with Approved Supplier List (ASL)
Common mistakes include allowing purchasing to source from suppliers not on the current ASL under time pressure, undermining the entire purpose of maintaining the list.
Other problems include failing to update the ASL promptly when a supplier's certification lapses or performance declines, leaving an inaccurate list that no longer reflects true supplier qualification status.
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