NHL Network's Craig Button has been tracking playoff positioning -- using a variety of statistical categories -- for several years now. His formula, while not a true probability exercise, has proven to be very effective at predicting the cutoff number to secure a Stanley Cup Playoffs berth.
In its simplest terms, Button's formula uses a team's current winning percentage, factoring in games remaining, to arrive at the number of wins -- and points -- each team will finish the season with. From that exercise, the formula can extrapolate the magic number for qualification and which teams currently in the race will reach that number. This equation will also determine tiebreakers should they become necessary.