I have done dozens of Cpk studies for P&P machines, and I hope this is the right way! I use the program data for the part centroid and angle of placement for each part, then measure the actual placement location and angle on 30 panels for that exact same part. I usually do this for 20 different parts on each of the 30 panels. The difference between the programmed placement location and actual, combined with your process spec for accept/reject make up the data set for Cpk. I would do something similar for dispensing, using the center of the dot and diameter in place of placement angle. Jon Moore --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------