Ken, before calculating Cpk you need to show the process is in control with SPC charts. From the data you use to make the charts you can calculate Cpk. Let me know if you need more information. Lou Hart -----Original Message----- From: Ken Fong [SMTP:[log in to unmask]] Sent: Monday, July 02, 2001 10:36 PM To: [log in to unmask] Subject: [TN] Sample size in computing cpk Dear Technetters, Could anyone give some idea what the minimum sample size is when calculating the cpk of a process. And based on what theory to arrive at this minimum sample size? Thanks, Ken ------------------------------------------------------------------------ --------- 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 ------------------------------------------------------------------------ --------- --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------