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Comment by mpenn | Hacker News Reader

Ok, some more of the statistics on the 20% number.

We had each tailor measure each person across 17 different measurements. Across those 4 tailors (on each person and each measurement), you could see a standard deviation. So then we also looked at the standard deviation of the average of those 4 tailors vs. the MTailor software's system. Our standard deviation was 20% lower.

Happy to go into even more detail if people are interested!

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Looks like a really cool product. Are you thinking of moving to android? Don't mean to nit pick but you are mixing up accuracy and precision. If your standard of deviation is 20% lower, then you are more precise then professional tailors. Accuracy denotes some distance from some "true" value. Accuracy != Precision http://en.wikipedia.org/wiki/Accuracy_and_precision

Definitely planning on Android (but not for a few months).

You're definitely right about precision vs. accuracy. The phrase never polled as well. Maybe if we'd run our surveys in the statistics department it would have been different. :-)

Regardless of what polls tell you, calling precision accuracy is inaccurate.

I'd love to know more detail, if you can share it without spilling the secret sauce.

From the video, we build a full 3D scan of you (lots of math / machine learning here). Then we essentially take a digital tape measure to your 3D scan.

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