NAPT Regional ILCs Are Back
Join Us This Summer
After several years without in-person Regional Interlaboratory Comparisons (ILCs), NAPT is bringing them back in response to strong demand from laboratories looking for hands-on proficiency testing opportunities.Regional ILCs allow laboratories to participate in an Interlaboratory Comparison Proficiency Test, where participants perform measurements using their own standards and compare results with other laboratories in a structured, collaborative environment.
NAPT will host two Regional ILC events this summer in Minneapolis, MN and Greensboro, NC. To help us confirm scheduling and plan testing time blocks, interested participants are asked to sign up in advance.
Reserve Your Spot for Minneapolis 
Minneapolis, MN
Minneapolis, MN
Summer 2026
Upcoming Regional ILC Events
Minneapolis Regional ILC
June 23–25, 2026
This two-day event allows laboratories to complete an Interlaboratory Comparison Proficiency Test (ILC PT) in a structured, in-person environment.
Participants will:
- Bring their measurement standard or instrument
- Participate in a scheduled testing time block
- Perform measurements as part of the ILC comparison
- Review and discuss results with peers and NAPT technical staff
- Share best practices and technical insights with other laboratories
NAPT staff will be onsite to facilitate the comparison process, answer questions, and guide participants through the testing procedures.
Attendance must be confirmed early.
Participants are scheduled into specific time blocks, so NAPT must know who plans to attend in advance in order to organize the testing schedule.
Confirm Your Interest
Minneapolis Regional ILC — June 23–25, 2026Greensboro Regional ILC
July 21-23, 2026
The Greensboro Regional ILC provides laboratories with a multi-day opportunity to participate in an Interlaboratory Comparison Proficiency Test while collaborating with other professionals in their field.
Participants will:
- Bring their measurement standard
- Sign up for a scheduled testing time block
- Perform measurements as part of the comparison process
- Discuss procedures and results with NAPT staff and fellow participants
NAPT experts will facilitate the comparison activities and support participants throughout the testing process.
Attendance must be confirmed early.
Participants are scheduled into specific time blocks, so NAPT must know who plans to attend in advance in order to organize the testing schedule.
Confirm Your Interest
Greensboro Regional ILC — July 21-23, 2026
Important Participation Notes
Available Test Disciplines
Include:
- Coordinate Measuring Machines (CMMs)
- Surface Plates
- Balances/Scales
- Hardness Testers
- Optical Comparators
Participation Guide
A detailed participation guide, including preparation instructions and schedules, will be shared with confirmed attendees prior to the event.
Scheduling
Participants will be assigned specific time blocks during the event in order to complete the comparison activities.
Final scheduling will be determined once attendance is confirmed.
Travel & Accommodation
Participants are responsible for arranging their own travel and accommodations. Additional logistical information will be shared with confirmed attendees.
Cancellation Policy
NAPT must confirm sufficient interest to host this event. If minimum participation is not reached, the event may be cancelled 30 days prior to the event date.
Regional ILCs are Back
Join NAPT this summer for in-person Interlaboratory Comparison events hosted in Minneapolis and Greensboro. Space is limited and attendance must be confirmed in advance.
