

Study says failure rates 15 times that of what manufacturers indicate









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RE: misleading
By bldckstark on 3/11/2007 2:36:14 PM , Rating: 2
I read a while back that the company that invented the blue led was psyched becaue their 5 years of testing was up, and they were finally going to be able to sell it. An led's standard accepted life is 5 years minimum, so they have to test them for 5 years in order to market them successfully. There was no statistical inferation of the outcome. They lit a bunch of led's, then they left them on for 5 years. As far as I know some of them are still on. This was a big deal, because first comes the led, then the laser. That is where the BR-DVD came from.

My point is that not all companies/markets use this form of highly misleading statistical analysis, although many do. You might note that lightbulbs last about as long as they say they will on the box.

Samuel Clemson (Mark Twain), said in the 1800's that there are three kinds of lies -
1. Lies
2. Damned Lies
3. Statistics

RE: misleading
By Oregonian2 on 3/12/2007 1:33:54 PM , Rating: 2
Could also just mean that they didn't understand the failure mechanisms sufficiently so that they could use mathematical methods to extrapolate failure rates based upon shorter term testing.

So they didn't sell ANY until after 5 years?

