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Marcio Jose Sanchez/Associated Press

As we begin the final full month of the 2015-16 NBA season, the instability atop the power rankings proves there's a lot left to be decided in a short amount of time.

This week brings the biggest shake-up in months, as eight of the top 10 spots have shifted since we last ranked on Feb. 26. It's hard to know how permanent the struggles facing the Oklahoma City Thunder and Cleveland Cavaliers will be, but they've certainly forced us to recalibrate the league's in-the-moment power structure.

Some of the steadier, less celebrated squads have quietly risen to take their spots.

As a reminder, overall performance is a factor in these rankings, but recent efforts weigh most heavily. The goal is to organize all 30 teams into an order that reflects how well each is playing right now. So a hot streak at the beginning of February will be a consideration, but it won't matter more than a losing skid from last week.

March is upon us, and things are getting serious.