How does Chess.com's analyser classify blunders?

I'm looking to analyze chess games to find when blunders are most likely to occur. In order to do this, I would like to be able to detect blunders from a change in the point system?

I know that blunders are subjective, but would like to have a way to detect them automatically.

Essentially it is just a numerical evaluation change, the higher it is, the more likely it is considered a blunder. I don't believe the site has released details on the magnitude of change that makes one move a mistake and another a blunder.

I think there is an official informational thing somewhere on chess.com.  I could be wrong, but I believe its roughly inaccuracy is a change in evaluation between the best move and the one you played of +/- .33 to 1.0, mistake is something like +/-1.0 to 2.5, and blunder is more than that.  However, I believe the chess.com system does take into account the game situation.  For example, if the engine evaluation is like +28, then an evaluation difference of +/- 4 may not be called a blunder.  

If you are looking for games where blunders are most likely to occur

.....just check my archive. There should be plenty of examples, unfortunately.

Maybe a bit off-topic, but is there any instruction manual to understanding Chess.com's analyzer. A lot of it is Greek to me.