Daryl Shilling
11-19-05, 11:22 AM
A shameless copy and paste of a post that I already wrote this morning. :)
We're right around 1/4 of the season, so in this post, I thought it would be a good time to look at how the Oilers have been doing in plus/minus, but with a twist on the traditional method. Alot of people like to poo-poo +/-, saying that it doesn't mean anything, that it's useless for comparing players on different clubs, but as long as certain things are accounted for, you can greatly reduce these things. Good players on bad teams can be a minus, and bad players on good teams can have plus ratings, so certain issues need to be addressed.
Here is the Adjusted Plus/Minus per 1000 Even-Strength Minutes, for the Oilers roster so far this year. The idea is to determine the rate at which players compile pluses or minuses, compare it to the team average, and account for differences in ice time. By not accounting for ice time, defensemen almost always move up to the top or sink to the bottom, due to their greater chance of penalty/reward from having more icetime than forwards.
Determing this is straight-forward:
a) Team Plus/Minus Adjustment (TPMA) = TESPM / TESM
-where TESPM equals Team Even-Strength Plus/Minus and TESM equals Team Even-Strength Minutes
b) Even-Strength Plus Minus (ESPM) = PM - SHP
where PM equals the player's Plus/Minus, and SHP equals Short-Handed Points
c) Plus/Minus per 1000 Even-Strength Minutes (PM1k) = ((ESPM / ESM) - TPMA) * 1000
Oilers roster, by position:
We're right around 1/4 of the season, so in this post, I thought it would be a good time to look at how the Oilers have been doing in plus/minus, but with a twist on the traditional method. Alot of people like to poo-poo +/-, saying that it doesn't mean anything, that it's useless for comparing players on different clubs, but as long as certain things are accounted for, you can greatly reduce these things. Good players on bad teams can be a minus, and bad players on good teams can have plus ratings, so certain issues need to be addressed.
Here is the Adjusted Plus/Minus per 1000 Even-Strength Minutes, for the Oilers roster so far this year. The idea is to determine the rate at which players compile pluses or minuses, compare it to the team average, and account for differences in ice time. By not accounting for ice time, defensemen almost always move up to the top or sink to the bottom, due to their greater chance of penalty/reward from having more icetime than forwards.
Determing this is straight-forward:
a) Team Plus/Minus Adjustment (TPMA) = TESPM / TESM
-where TESPM equals Team Even-Strength Plus/Minus and TESM equals Team Even-Strength Minutes
b) Even-Strength Plus Minus (ESPM) = PM - SHP
where PM equals the player's Plus/Minus, and SHP equals Short-Handed Points
c) Plus/Minus per 1000 Even-Strength Minutes (PM1k) = ((ESPM / ESM) - TPMA) * 1000
Oilers roster, by position: