TechNetters, here is another question about SPC.

Is anyone using SPC at the board image printing operation?  Our people 
here have been, at times and in an undisciplined way, been taking energy 
data from the printer.  The gauge is put at 9 points in a grid and energy 
delivered thus measured.  (These 9 measurements are made at approximately 
the same time, at the start of a shift, say.)  To me, this approach 
seems to lend itself to SPC.  Presumably, the measurements would be done 
on a regular schedule.

Anyone care to comment or correspond?   Lou Hart  Quality Assurance
Compunetics 412-858-6117