Here's where people don't know their power law! 10 weld failures on bundle is 'unexpected' and 'totally unforseen'. Sure there have been weld failures before, maybe at most a few, but never 10! (blah, blah). Of course, if you had plotted weld failure frequency, you would have seen the, oh so dangerous, exponential curve, similar to earthquakes. That means you get a whole bunch of nice rumbly little ones, and then KABLAM! a big one!
I've cussed forever about companies that follow power law. They don't know what a horrible horse they are riding!