In message <!&!AAAAAAAAAAAYAAAAAAAAAJBbQmYH6FNPl0oV0KGUzsyChQAAEAAAAFWDfmYRsYJMlAsxE qSKmE4BAAAAAA==@blueyonder.co.uk>, dated Sat, 18 Aug 2012, John Allen <john_e_al...@blueyonder.co.uk> writes:

NRTLs inspect from 2 to 4 times a year, often on an unannounced basis, and that does keep manufacturers ?on their toes?

I wouldn't call that 'far' more frequent, and that sort of control can be deadly - see below.

and, for those NRTLs which have detailed product files against which to inspect, the chances of finding non-compliant variations is (or at least should be) much higher.

The point is that this is 'after the event' control. "According to our records, you were using the XY23B part, but we see that you are now using the XY23C, which is not yet approved by us, from sometime after our last inspection four months ago. We have to withdraw certification from your whole production since that inspection date until every unit you have in stock or can recover is examined and modified to conform. That will be $100 000 penalty, please." (OK, I don't know the exact procedures in case of this sort of violation, and maybe I shall never have to learn, but I hope you see what I mean.)

With self-certification, the appropriate action is to determine whether the product is still compliant when the XY23C is introduced, or when the substitution is discovered, with tests if necessary, and if it is, no further action is necessary.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Instead of saying that the government is doing too little, too late or too
much, too early, say they've got is exactly right, thus throwing them into
total confusion.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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