HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/3  >  >>
roddalitz
User Rank
Gold
Precise failure mechanism?
roddalitz   5/7/2012 11:35:28 AM
NO RATINGS
I read that the position which failed held the batteries in a "canted" position, but what was the precise reason for the test failing? Did the canted batteries fail to make contact at all? Was there poor contact resistance, or what? The observation and deduction is smart, but I feel I am left hanging.

jhankwitz
User Rank
Platinum
Gage R&R
jhankwitz   5/7/2012 10:51:45 AM
NO RATINGS
Most any Quality Manager worth their salt will run Gage R&R (gauge repeatability and reproducibility) on their test and verification people and equipment on a regular basis.  When you don't do this, you haven't a clue as to what you're producing.  You need to understand or get get full control of all variables in your inspection processes.

Our people are amazed when we report the source of variables and variation in our most basic inspections (like using a mic or caliper).  It's a real eye-opener for most people outside the Quality field.  Managing Type I and Type II inspection errors is a fundamental problem in most every company.

Nancy Golden
User Rank
Platinum
Re: Check and Double Check ?
Nancy Golden   5/7/2012 10:12:57 AM
NO RATINGS
The Odd Couple - Felix and Oscar - haven't thought about them in years! I probably saw that episode, I can certainly picture Felix doing exactly that, LOL! Thanks for the memories, OLD_CURMUDGEON!

OLD_CURMUDGEON
User Rank
Platinum
Re: Check and Double Check ?
OLD_CURMUDGEON   5/7/2012 10:01:36 AM
NO RATINGS
In one of the more famous (TV) episodes of the ODD COUPLE, Felix Unger told the judge a simple fact .......  When you ASSUME something, you make an ASS of U and ME!  Very sage words, indeed!!!!

GlennA
User Rank
Gold
Assumptions
GlennA   5/7/2012 8:38:00 AM
NO RATINGS
The 'When you assume...' phrase is common, but useless.  Everybody makes assumptions.  Assuming the rejected parts are actually bad, or assuming the rejected parts are really good is a beginning of troubleshooting.  The real trick is to know and realize what your assumptions are, and be prepared to revisit them when troubleshooting doesn't agree.  During a light-hearted conversation I was asked of I knew what happens when you assume.  I replied 'Did you assume that I was listening to you ?.  Of course you can't say that to your manager.

Nancy Golden
User Rank
Platinum
Re: Check and Double Check ?
Nancy Golden   5/5/2012 5:34:36 PM
NO RATINGS
The author did a good job isolating the problem. I think perhaps the other folks were not so experienced in troubleshooting. I'll never forget as a young tech making an assumption that wound up delaying a resolution to a problem we were having. I don't remember what the problem was but I sure remember my angry boss pulling me into his office and writing       ASS U ME in large letters on his white board. He then asked me if I knew what happens when I assume - If you look closely, I  am sure you can figure out the rest of the story...

That happened in 1990 but is a lesson I carry with me to this day!

Nancy Golden
User Rank
Platinum
Re: Common Assumption
Nancy Golden   5/5/2012 5:33:18 PM
NO RATINGS
That's funny tekochip - I had the opposite problem. When I was a test engineer and parts started failing, everyone always wanted to point to the test set. I always kept calibrated "golden" units around so that I could verify tester operation. I made sure my golden units included passing units at both ends and the middle of the spec as well as rejects. Most of the time that would satisfy all involved that we needed to look at the parts themselves...

ScotCan
User Rank
Platinum
Re: Check and Double Check ?
ScotCan   5/4/2012 5:34:43 PM
NO RATINGS
That is very true. There is no way that time would have been allocated for troubleshooting during production. In fact several of the gizmos I designed for in process trouble shooting had to be carefully designed such that if production supervision called for their removal they could be removed on the fly without interruption to the line flow. 

GlennA
User Rank
Gold
Re: Check and Double Check ?
GlennA   5/4/2012 5:27:18 PM
NO RATINGS
Another variable may have been your testing the rejected parts during the operators' break time.  If you had instead tried to take 'production' time to do the testing you may not have been allowed the time you needed.

ScotCan
User Rank
Platinum
Re: Check and Double Check ?
ScotCan   5/4/2012 4:27:42 PM
NO RATINGS
The rate at which the cells were produced provided very little time to troubleshoot, and policy was to make up the shortfall where suspect cells were concerned, quarantine the defects and pick up on their disposition later. For some reason management left me to my own devices and I could work at a rate that suited me instead of being under pressure.

<<  <  Page 2/3  >  >>


Partner Zone
Latest Analysis
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team 100 to make (about $161 US).
At Medical Design & Manufacturing Midwest, Joe Wascow told Design News how Optimal Design prototyped a machine that captures the wing-beat of a duck.
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
More:Blogs|News
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service