Quote:
Originally Posted by DeltaBetaBaby
I also don't know if there have been changes to the RFM over the years. As I understood it, back when I was in school the formula was:
invitations = (number of women still in recruitment/number of chapters) *(number of parties in the round/average return rate of the last three years)
So, if there were 500 women going to pref, and each woman could attend two prefs, and ten chapters, a chapter with a 100% return rate could issue 150 pref invitations, and a chapter with a 50% return rate could issue 300 invitations.
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Quote:
Originally Posted by AZ-AlphaXi
the new RFM (release figure method) has a new formula which also takes into account the number of women likely to accept a bid from a chapter and restricts the number of preference inviations the strong recruiting chapter can issue even more that the old formula which was based more on statistical equality.
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Yes, the new release figures force higher performing chapters to release far more than in DBB's example.
I do not know the actual formula, but it takes into account not just return rates but relative recruiting strength, which is probably calculated by priority rankings, or number of PNMs that put a certain chapter in their top 8 (or whatever number) for the next round. "Return rates" don't really show the whole picture. Though a weaker chapter may have 80% return, I guarantee not all 80% put that chapter in their top 8. They return because other chapters cut them and they need to have a full schedule.
Using DBB's numbers, 500 PNMs, 10 chapters, projected quota at 50, and 3 pref parties (I think DBB meant 3 though she wrote 2 because of her math)...
The highest performing chapters (those with 100% or close to it return rates) do not need to invite 3x projected quota to pref to make quota. It's probably more like 1.5x projected quota. Because top chapters are forced to trim their bid lists to only what is necessary to make quota, if other top chapters outcompete them in one year, they sometimes miss quota (though spots are usually filled quickly with snap bids).
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