[ymu]

The maths of a push is (amongst other things) down to your opponents calling ranges. If they're bad, they will call loose anyway. If they're decent and you've been pushing a lot, or have a LAG-maniac image, their calling ranges will probably loosen (especially if you're pushing a lot into the same players' blinds), so your pushing range will need to tighten.

ICM calcs will tell you whether or not a push a good idea in a given situation. The advice will be accurate if <u>and only if</u> you put reasonably accurate calling ranges in for the villains behind you.