ISO/IEC 17025 Accreditation · 6 min read
Choosing an Accredited Calibration Lab: A Buyer’s Checklist
Choosing a calibration lab is a supplier-quality decision your auditors will scrutinize. Here is the checklist that separates a defensible choice from a cheap one you will regret.
Part of our guide to ISO/IEC 17025 Accreditation, Decoded.
The must-haves
Before price, confirm the fundamentals:
- Current ISO/IEC 17025 accreditation, verified in the accreditation body’s directory
- A scope that covers your specific measurements and ranges
- Certificates with as-found/as-left data, uncertainty, and a stated decision rule
- CMC small enough to give an adequate TUR against your tolerances
- A documented handling of out-of-tolerance results
The differentiators
Once the must-haves are met, service is what you live with day to day: realistic turnaround (and expedite options), whether you can talk to an actual technician, logistics (pickup routes or mail-in), and whether the lab covers enough disciplines to consolidate your equipment with one accredited supplier. A smaller independent lab often wins here on responsiveness and direct access.
Common questions
Should I use one lab or several?
Consolidating with one accredited multi-discipline lab simplifies your supplier-quality records and logistics, as long as its scope covers your equipment. Use a second only for specialties outside that scope.