It doesn't take into consideration your body shape, your workout regimen, muscle vs. fat, it's just your Weight and Height.
I've been "overweight" by Army standards since 1997. That was when I was told that I needed to start working out and build some mass. So I did. PFC Ragin' Dave went to the gym and started lifting weights. As it turns out, my physiology is really, REALLY good at putting on muscle mass. I went from 172 to 189 in a matter of months. My waist stayed the same size. And the Army told me that I was overweight.
Dude, I was maybe 10% body fat. Maybe. I was fucking ripped, and I could run with a Mk-19 in my arms and the tripod on my back.
For reference, the Mark 19 Automatic Grenade Launcher weights 77 pounds unloaded. And I could haul ass with that fucker, get it on the truck, mount it and get it ready to rock and roll without anybody else helping.
Overweight? Bullshit. So lets do away with the BMI and other bullshit tests to see if someone is overweight.