🚀 go-pugleaf

Eric Stern, commenting on my proposed method to deal with
steel rules, said, "Daniel's solution seems to me equivalent
to killing flies with heavy hammers.

     "Wrist straps have several properties quite distinct
from rulers: they are critical to the performance of the
electronic equipment and they have the frequent habit of
losing their effectiveness. For that reason they need to be
constantly monitored.

     "Rulers seldom loose their calibration and many of
their uses are trivial and non-critical to performance. Daily
checking is way out of proportion with the need for most situations
that I am aware of."

He is exactly right. the frequency of checking depends upon
the probability of the instrument being wrong. clearly, a steel
rule does not need daily checking!

My point was intended to illustrate a method of control of
a simple instrument that allows a high probability of
good measurements with a low administrative overhead.

Daily checks are necessary, I believe , for wrist straps. They
are far too frequent for steel rules.

Thanks for the correction.

Dan O'Leary CQA, CQE CQM, CRE
Business Process Executive for Manufacturing
doleary@qbe.picker.com