Bob,
This is something I have raised a few times on the Technet and something
which you have always replied to. I think benchmark PPM figures would be
invaluable in the industry as long as company names are not disclosed.
Yes, we all have 'special cases' which result in higher ppms but our aim
should be to eliminate the special cases by design changes or process
changes to overcome the problem.
If everyone could agree to start giving out data in an agreed format (based
on the draft IPC standard which I have forgotton the number for!) then maybe
we can start getting some useful data so we know how well we are doing.
Regards,
Neil Atkinson
-----Original Message-----
From: Bob Willis [mailto:[log in to unmask]]
Sent: Tuesday, November 13, 2001 7:26 PM
To: [log in to unmask]
Subject: [TN] PPM Monitoring and Benchmarking
Based on the SMART Group On-Line survey on defect monitoring, to date the
use of PPM Parts Per Million Monitoring is the most popular method which is
well covered in the IPC document see www.smartgroup.org
<http://www.smartgroup.org>
I have asked the question before but would engineers like to have an average
PPM level each month for screen print, component placement, reflow and wave
soldering to compare with their own production results. It would have to be
based on a known technology but could be valuable as a point of reference
for benchmarking. Its a little project we are considering over the UK and
would like to know its value to other engineers. I know there are many
issues but as long as everyone know what the data is, where it comes in
terms of board type NOT COMPANY and how its calculated I think it has a
value.
Please let me know your thoughts on the subject.
Bob Willis
Electronic Presentation Services
2 Fourth Avenue
Chelmsford Essex CM1 4HA
England
www.bobwillis.co.uk <http://www.bobwillis.co.uk>
Tel: (44) 01245 351502 Fax: (44) 01245 496123
Single solution to your seminar, conference or roadshow
www.seminar-registrations.com <http://www.seminar-registrations.com>
**********************************************************************
Notice:
The information contained in this e-mail (including any attachments) may
contain commercially sensitive or confidential information which may be
legally privileged and is for the sole use of the intended recipient(s). If
you are not, or believe you may not be, the intended recipient, you are
hereby notified that any use, dissemination, copying, review, disclosure or
action taken in reliance of this e-mail is prohibited and may be unlawful.
If you have received this message in error, please notify the sender
immediately by reply e-mail and delete all copies of the message.
Any views expressed in this message are those of the individual sender
unless expressly stated by the sender to be given on behalf of Tellumat
(Pty) Ltd. Tellumat (Pty) Ltd disclaims liability for any unauthorised
opinion or representation made by the sender on behalf of Tellumat (Pty)
Ltd.
No warranty is given by Tellumat (Pty) Ltd that the integrity or security of
this e-mail (including any attachments) has been maintained through
transmission, nor that the communication is free of virus, interception or
interference.
**********************************************************************
_____________________________________________________________________
This message has been checked for all known viruses by Star Internet
delivered through the MessageLabs Virus Scanning Service. For further
information visit http://www.star.net.uk/stats.asp or alternatively call
Star Internet for details on the Virus Scanning Service.
---------------------------------------------------------------------------------
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
---------------------------------------------------------------------------------
|
