To All, I would also reccomend Total Quality Control by Armand V. Feigenbaum as one reference and the CQE primer published by the Indiana Qualit Council (I think thats publisher). Cp Cpk are essentially scores based on how repeatable and accurate your placements are. For placement equipment you would run a glass master or equivalent for your particular machine and you measure how precise each placement is. In the past at another company we bought Universal machines and they provided us with the Cp/Cpk scores. Your vendor if its not Universal should be able to do the same. Tony Di Mauro Circuit Technology Center Haverhill MA. --- Phil Crepeau <[log in to unmask]> wrote: > hi, > > by far, my favorite book on this subject is > 'design(ing?) for quality' by lochner and matar. it > is so simple and so well presented that you should > immediately grasp what you need to do to design an > experiment to determine the process capabilities > (Cpk's) of your processes. > > phil > > -----Original Message----- > From: Peter Tremewen [mailto:[log in to unmask]] > Sent: Thursday, April 27, 2000 4:20 AM > To: [log in to unmask] > Subject: Re: [TN] PPM values for the Electronics > Industry > > > > > > Finally in terms of qualifying equipment, I would > not > > put much weight on a ppm number but would look to > Cp & > > Cpk numbers as these a the true measurements of a > > piece of equipments capabilities. > > > > Tony Di Mauro > > Blink, Could you explain what Cp and Cpk > means in this context???? I'm > intrested in compilling real satistics for our pick > and place machines, but am > relitively unexperianced. Also if any one could > recommend some (preferably cheap) books > on the subject I'd apreiciate it. > > Peter Tremewen > > ############################################################## > TechNet Mail List provided as a free service by IPC > using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to > [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site > (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at > [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC > using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to > [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site > (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at > [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## __________________________________________________ Do You Yahoo!? Talk to your friends online and get email alerts with Yahoo! Messenger. http://im.yahoo.com/ ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################