I used to measure for anthro in my API stash job, as well as analyze and input the data for final restriction determinations.
There are a few things I can tell you based on being used as a slave for my boss to realign the program, so that fewer measurements were required.
1. Most places measure incorrectly. The guys at the BMC's where candidates are measured are trying to get you out of there over doing it the right way. You think you have great results going into API, but then they see numbers that do not add up, and will require that you get remeasured. This will usually make you re-eligible for that platform you don't want (Had it been an inch or two shorter they would have been on the no helo program usually). When you are measured, be sure that your shoulder is all the way against the back of the chair for functional reach, and that you do not wear shoes with a large sole. Those were two of the reasons the data was skewed.
2. NOMI did not allow single pipeline students when I was in the office. That means that you have to be eligible for two of the three choices (PROP, HELO, JET). If you were restricted from two, you were dropped from pilot and sent NFO, or dropped from NFO to be sent to the DDG.
3. Measurements were determined by a web site "available only" to the aviation physiology community. Your numbers were input, and it spit out a list of things you couldn't fly, and saved your record for future reference. The reason you don't find out what you are restricted from until API, is that API staff are the first people you will come across in your flight career that have access to this site.
4. Weight measurements are for the ejection seat. If you are too light or too heavy, you may not come out of an ejection in the greatest shape. People don't know that waivers can be signed for this in some cases.
Any of these could have changed by now, but it should give an idea to how these guys work/think.
