Each member of the power-play unit must have patience, composure and intelligence when reacting to the defensive style employed. Possession of the puck is highly critical in setting up the power play. Usually, a team will take the puck behind its own goal and set up a breakout play, using short, crisp passes up the ice in an attempt to carry it over the defense's blue line, maximizing possession and controlling the flow. After gaining the offensive zone, the power-play unit must analyze the defense. These factors must be monitored to set up that percentage shot.
Pressure is the key theme.
Constant pressure wears down defenders and the goaltenders, increasing the chance of scoring. Putting fresh skaters on the ice at key times of the power play may help tire the penalty-killing unit, creating an additional advantage. Adjustments depend on what the defense is giving. This information is often uncovered through advance scouting and video analysis. Ideally, that information can be employed during practice sessions in preparation for upcoming games.