I'm in the process of updating my rankings to reflect this change, but it's a tedious process. I did, however, finish adding the home/neutral/away weights to the teams in the Great Lakes region. Here's how it affects my rankings:
|39||Washington and Jefferson||0.182||0.433||0.370||0.451||0.384|
|40||Case Western Reserve||0.400||0.416||0.412||0.374||0.381|
WP -- in-region winning percentage
SOS -- unweighted in-region strength of schedule
RPI -- unweighted in-region RPI
wSOS -- weighted in-region strength of schedule
wRPI -- weighted in-region RPI
The weighting system causes Calvin to fall from #5 to #18. That's because they've only played two regional games--one at home, and one at a neutral site. Olivet, on the other hand, jumped to the top of the charts by virtue of not playing a regional game at home yet. Their weighted SOS (wSOS) is nearly 0.160 higher then the unweighted version, whereas Calvin's is 0.087 worse.
Some schools only see slight changes, and some don't see any changes. Hope, for example, has played all of their regional games on neutral courts, so their schedule strength remains unchanged (1.0 multiplier).
These rankings still aren't anything close to being official. The regional committees don't compute an RPI value -- they treat WP and SOS (or wSOS, as it is this season) as completely separate criteria, or so they say. That doesn't quite make sense to me, because WP doesn't tell you much without SOS, and SOS certainly doesn't mean much without an accompanying WP, but not much the NCAA does makes sense. They'll also adjust for head to head games and results versus regionally ranked opponents when, and if, applicable.
We're still pretty early into the year, so the numbers will be pretty fluid in the coming weeks. Actually, they never really stabilize very much. Even if Calvin loses to Hope on Wednesday, they'll likely find themselves in the top 10 of this list come next week. That is, if they also beat Kalamazoo.