They flew him to various outsourced shops around the world to try to understand why, even when every detail was carefully spec'd, some parts (often cast) failed too often.
One thing he noticed was that, in some parts of the world, it is not uncommon to have some shop floors made of just dirt, rather than concrete. When you (as a manufacturer) have reduced costs associated with your choice of alloy to the bare minimum, there is little room for error 'in the mix'. Turns out that a dirty work environment can kick up a lot of dirt and dust and some of that finds its way into your alloy. And it surprised me how little it took to reduce the strength of the metal significantly.
There are subtle details that you and I might take for granted (like a clean work environment) that others have found as ways to shave their daily operating costs (locate in a primitive, less-expensive setting). You have to spec EVERYTHING.