- Joined
- Mar 28, 2001
- Messages
- 6,341
LOL... These questions and more will be answered in our new tutorial on the subject Ken. Can''t answer them now though.Date: 9/30/2005 10:41:00 PM
Author: kenny
I work in engineering.
No test equipment is perfect; it is accurate only to some specified tolerance.
When we see variation (exceeding that tolerance) in several measurements of the same item (or get data from another test set up that differs appreciably) we never report a single measurement.
We troubleshoot, calibrate, repair or modify the set up(s) so measurements become repeatable.
If tolerances are not acceptable we buy better equipment, or inform the customers of the variation allowed by the spec.
Yes, here we have seen variation in two BS measurement of the same stones.
But what is the spec on the BS?
How much variation on the scale is within spec for each of the three parameters?
It is possible nothing is wrong here.
It is possible that the erroneous assumption of perfect repeatability is all that needs to be addressed.
Peace,