The NFL owners voted to initiate a replay system in 1999, though it was modified from the old system that existed from 1986-1991. After many hours of meetings and discussions between owners, coaches, and members of the various committees, it was determined that the best approach would be a coaches' challenge system. That's what we now operate under. As the season winds down and the playoffs near, the replay system becomes more and more of a focal point. This time of year, every play is critical.
Instant replay is designed to eliminate such controversies.
In light of all this, I thought it would be a good time to discuss the philosophy, the design, and the scope of the NFL's replay system. First, it's important to realize which plays are reviewable and which are not. In the other category are calls of more than 11 players in an offensive huddle, whether an onside kick hits the ground off the tee or whether it is airborne, and all penalties. These plays are not reviewable. For the most part, I believe this system covers the plays that might determine the outcome of a ball game.