Saw
this article today and it made me question, again, WTF is America still doing with imperial units?
I get that it would be an expensive transition....but the potential upside rewards are enormous. I'm willing to bet industries across the board would see productivity increase and mistakes decrease after a few years of getting used to the metric system. Not to mention vastly more streamlined international collaboration. I work in the construction industry, so I've become pretty deft at the absurd sub-inch arithmetic. But it takes time, even on the best of days. Occasionally, I will work on a project in another country that has metric and it is, immediately, so much faster and intuitive to work with.
Thoughts?
They got the very first one wrong. The mars climate orbiter was a screw up at JPL and it happened because JPL (in the United States) had required the data it was receiving to be in metric, and the data was supplied in standard units. My understanding, and I'm still trying to find corroborating evidence on this, is that the units were
converted into standard because it was
assumed that JPL would want them in standard, even though the specs said metric. But I could be wrong on that. It's only what I heard from multiple people, not something I've seen documented.
Regardless, engineers should check their units.
The article pretends that this is some kind of red-blooded American pride holdout issue, when in reality it's a money issue. Ask Boeing why they use standard instead of metric and they'll give a really simple real-world response. Part of the reason they're able to make airplanes is because they have gazillions of hours of materials testing data in their logs. Data that is proprietary and which competitors would love to get their hands on. That testing data, which is worth many millions of dollars is for thicknesses of material sheets that are in standard units. It's for fasteners that are standard sizes. They know how much that 5/16s fastener can hold. Yes that's
almost an 8mm fastener. But it's
not an 8mm fastener, and that's not good enough.
Crap like that exists all over the engineering world, and nobody wants to pay to change until there is a financial case for it to them specifically.
I love the metric system, it's a better system (except Celsius, which sucks).
Edit:
Nope, it looks like the underlying software did not convert to standard from metric, it reported in standard "natively" as it were. The error was lockheed martin's, for not adhering to the software spec and providing standard units instead of the required metric. JPL didn't check it carefully because it had been customary for a long time to provide that data in metric. It was something that was not just required, but had become common practice.
NASA was gracious enough to pull the "we should have caught this in time" card and accept blame. But it was lockheed's mistake ultimately and NASA let them off the hook.
You could almost more accurately say that this error was the result of people within the US moving
to the metric system.