D.Scott said:
NAVLAP is just as well respected by those who take the time to look into it
NVLAP is the Cadillac AB in the U.S., and unfortunately the most expensive. However, they are the best. If you survive the assessment, you join an elite group.
The rest of us are lower cost, and each of us have our strong points, and weak points.
Questions I might suggest you ask each (IAS, A2LA, L-A-B, ACLASS) include:
1. Actual cost to be estimated in a quote, that includes assessor days based on scope, travel expenses, etc.
2. The AB's schedule, that is, how quickly can the AB serve you, assuming no big issues?
3. What staff person will personally handle your file, start to finish?
4. What are the policies on training, PT/ILC, measurement uncertainty, traceability?
These questions will get a very rough picture of the AB and the service one can expect.
Then ask existing clients of the AB. Download scopes and contact information from each, just a sample will do, then call and ask each how the service has been to them.
Then you get a more complete picture of how to select your AB.
Hershal