Electronics Forum | Thu Jan 04 18:54:34 EST 2007 | russ
We use DPMO when talking to customer and yield when trying to figure out how to make more money in the shop. Does that make sense? Russ
Electronics Forum | Thu Nov 13 12:08:50 EST 2008 | cisridn
I define First Pass yield without any repairs. But I only consider a PCB to need repair if it fails test. Our boards are inspected before testing and any work done before testing, I consider to be rework and is part of the SMT process.
Electronics Forum | Thu Aug 19 14:54:44 EDT 2010 | jamyboy
Has anyone out there successfully switched from First Pass Yield to DPMO metrics and most importantly, sold MGMT on the change?
Electronics Forum | Mon May 16 08:54:10 EDT 2011 | ehudgitai
RH is EMS Turn-Key provider in the Low Volume High Mix products. I am looking for comparison data (benchmark) related to First Time Yield results in similar EMS companies.
Electronics Forum | Thu Jan 04 15:39:07 EST 2007 | dyoungquist
While the 85% yield on a per board basis seems low, we are actually running over 99% yield on a per solder joint basis as there are about 17,700 joints per panel. On average, 9 out of 63 boards in the panel need rework. Rework issues include missin
Electronics Forum | Thu Jul 18 12:33:21 EDT 2002 | slthomas
Not sure if you're trying to improve your defect rate (we use dpmo) or your test yield. The question is what do you do if you're happy with your dpmo levels but not some of your first pass yield numbers because certain boards have more parts. Inspe
Electronics Forum | Thu Aug 29 12:48:26 EDT 2002 | slthomas
Assuming all things are equal (attention to good DFM guidelines, well trained and capable operators, well maintained equipment, etc.), which would you expect to have the higher process yield, standard SMT/through-hole all topside, or all SMT bottom (
Electronics Forum | Tue Aug 29 06:00:47 EDT 2006 | bwet
Ladies and Gents: There have been several studies including (http://www.solder.net/PDFs/LeadFree_BGATesting_InitialCycling_BEST.pdf) which have shown lower fast pass yields with solder paste. Based on internal projects of 1000+ of the same BGAs we a
Electronics Forum | Thu Nov 09 22:21:18 EST 2006 | John S.
I would think it would be more productive to compare DPMO. Particularly across different products. A simple board of 20 components should yield much higher than a complex board of 200 components. Also, some consideration should be given to the dif
Electronics Forum | Thu Apr 30 14:41:46 EDT 2009 | bandjwet
There was a paper recently presented by R Cirimele at the CALCE Reliability symposium in which extensive testing was done on a part (thermal stress, vibration, shock) after numerous reballing cycles. This show no failures on the reballed parts. In t
