Is there a quantitative method to follow to determine FILLFACTOR for NONCLUSTERED INDEXes? I've read different ideas to set FILLFACTOR and then monitor fragmentation over time (#1: 5 Things About Fillfactor, #2: Database Maintenance Best Practices Part II – Setting FILLFACTOR).

Instead of making an 'educated' guess upfront and then adjusting, I was wondering:


If anyone knew of a (quantitative) way to determine what level of fillfactor would be needed upfront?


(I'm primarly concerned with respect to NONCLUSTERED INDEXes, as I typically create my clustered indexes on ever-increasing integers.)
No generalised quantitative method exists to be followed.

One would'e come up by now (1+ years since question), nor have i come across one on the internet searches.