Hi Neil, Here's a outline from my SPC for PCBs training manual. I hope it helps. If you need any additional detailed information, please feel free to contact me. Ed Cosper Director Quality Assurance and Engineering Graphic Electronics, Inc. Tulsa, OK ---------- From: Neil Atkinson[SMTP:[log in to unmask]] Sent: Monday, July 13, 1998 10:23 AM To: [log in to unmask] Subject: SPC Does anyone out there have any experiences of implementing SPC into PCB Manufacture, surface mount placement or wave soldering? And if so, what do you measure / count, have you been able to use many measures which allow you to calculate capability indices etc. At the moment I am getting bogged down in counting faults and using attribute charts as opposed to variables. Help!!! Neil Atkinson