Hockey’s 8 Factors

I’ve always felt it important for coaches to set benchmarks for their teams. And If I ever had the chance to run my own team, I knew what I wanted to see. Basketball analytics have the four factors (shooting, turnovers, rebounding and free throw efficiency) which can go a long way to determining the success of teams – both past and future. In hockey, in order to be a successful, I would want three things from my team: outshooting opponents by an average of five shots a game, averaging 3.2 goals per game and 2.5 goals against per game. If a team can accomplish those three things, they are, almost by definition, a championship contender.

So the way to get there is through the individual steps and the process. That led me to find the things that I consider to be important to achieving those three season-long objectives became the “8 factors”.

1) +5 shots on opponent: This seems arbitrary but it isn’t. A +5 advantaged typically works out to be in the 52-57 percent Corsi/For All neighborhood (depending on total shots in a game). It’s a quick rough hand way to determine if a team is driving play.

2) 20 percent PP efficiency: A power play with this percentage throughout the season will typically end up in the top third of the league.

3) 30-plus shots: The top 10 teams in shots/G are right around the 30 mark.

4) .106 shooting percentage: The math brought us to this. If we’re looking for 3.2 goals per game and 30 shots 3.2/30=.106. Including shooting percentage sort of adds a little bit of weight for luck.

5) 28 or fewer shots allowed: Again back to the being in the top third of the league for a season average.

6) .900 save percentage: Average goaltending should be enough to win if a team does the other things well.

7) 3 or fewer penalty kills: The worst team in terms of power plays allowed gave up 3.29 per game so allowing three or fewer is a positive

8) 82 percent PK efficiency: Again this would be top-third of the league

While some factors are direct correlations of each other (a +6 shot advantage would be a -6 for the opponent) there is wiggle room so if a team achieves a Factor Score of 6, the opponent would not automatically have a score of 2. The sample below is from the season-opening game between Tampa Bay and Pittsburgh.

TeamOppResultScoreshots +520% pp30+SF/G.106 spct 
PITTBLW6-27050.171 
TBLPITL2-6-70-20.071 
         
TeamOppResultScore28 SA/G.900 svpct3 pk82% pkGS
PITTBLW6-200.92911007
TBLPITL2-670.90611003

Pittsburgh hit seven of the eight benchmarks, missing only 20 percent on the power play after going 0-for-1. The Lightning hit on save percentage and both penalty kill goals, but only had 28 shots and were outshot by seven.

It is possible to have what I call reverse wins and losses, where the opposite of what the game score would show occurs. These are the stolen wins where a team plays bad but still gets the victory or vice versa. A fair share of these types of games involve overtime or a shootout where luck plays a greater factor.