Renaissance sculpting technique

I was reading that Michaelangelo scultped in a manner opposite that of most sculptors of his time. I assume that the choice was either to start from the front and work to the back or circle around. Which was more common and which did Micealangelo do?

Michelangelo apparently used the front-to-back method. Roughing out a sculpture for basic form and bulk was and is the more common method. You can see some of Michelangelo’s method in some famous unfinished works :Model: Michelangelo's St. Matthew