If the mods believe this should be on the other thread then move away. I just thought it would be nice to have a thread to discuss if our advice has been spot on or this presentation highlights some areas which we can refine our recommendations.
The document that pizza found was excellent.
It has some implications for advice we give on this forum. Some of this we probably already knew, some of it we may not have thought of. Though this is in the NextGen section it is implied for "classic" scores, though not to the same degree.
For those without delinquincies Utility is king, followed by age (if your history is clean), then mix and new credit.
For those with delinquincies - Payment history is king. So advice to dilute bad accounts with good tradelines is excellent advice. Age and new credit categories are much less emphasized and thus will likely be outweighed by better payment history on more tradelines. Mix matters little along with inquiries and new accounts (as negative factors).
Figures 8 b and 8c likely apply to "classic" FICO scores, though they are not as refined as NextGen.
Still in general we note that for young credit - utility, history, then new credit are the important factors, with age and mix less powerful.
The longer you hold credit the more important history becomes (explaining why a 30 day late dings an 800 score so much), and utility less so (though perhaps it applies its pain at a much lower util level), and age, mix, and new credit are much more important factors. This may explain why someone with 12 years of credit history may only get a 25 point drop from going from 90% util down to 50.