Comments are: * Some people use calibrated boards and components to remove sources of variation when using their CMM to measure placement accuracy. Sources of supply are listed in the fine SMTnet Archives. * It�s unclear that a single board will meet the assessment requirements of diverse types of equipment. * What is the point of �traces or vias� on a board used for assessing the capability of a printer or a pick & place machine? * Some suppliers offer services like these for their machines. * Developing meaningful statistical measures on so many components [ie, 0603, 0402, 0201, fine pitch, BGA and etc.] could be very expensive. Consider limiting yourself to fine and course pitch or BIG and small. * How do you plan to measure the capability of �Different stencil aperture�? And what�s the point? * How do you plan to measure the capability of �Mixed Technology (Throught Hole and SMT)�?
This sounds like someone read something about quality assessment and said �Yannick what is the capability of our SMT line?� As you�ve laid this out, you have got one BIG-assed job in front of you to do every year. Why not just say, �For a range of boards that have 0603, 0402, 0201, fine pitch, BGA and etc. components; this is a X [Er whatever X really is � ] DPMO line.�? And be done with it.
For Christmas mom bought me �Statistical Procedures for Machine and Process Qualification� Dietrich / Schulze, American Society for Quality 1999 [0873894472]. [Better than a sweater.] I can�t comment on it, but you can assume ASQ probably did a reasonable job of assessing the book and it�s in the third edition.
reply »