Level Increases: Bankroll vs. ROI

[Scuba Chuck]

This was a question I asked in another thread that I thought was worth discussing (at least it has benefit to yours truly).

I am questioning the logic behind the consistent comments that you should move up a level based purely on bankroll, especially if you're earning it, vs any other measure. So, for arguments sake, why shouldn't the 'indicator' be more a combination of bankroll and ROI before moving up?

What is a good ROI (per level) that one should shoot for before considering to move up a buyin level? For example a 40%+ ROI on the $10+1s is an obvious sign to move up.

And furthermore, what is the minimum ROI for someone to accept as an obvious sign to not move up per buyin level? For example, if you're achieving a 10% ROI at the $20+2 level, and have reached a $30+3 bankroll, I wouldn't feel confident to move to the 33s.

I ask this because it is usually 'suggested' that you move up a level based on bankroll. I moved into the $30+3 bankroll level in just 33 SNGs after reaching my $20+2 bankroll level. My ROI thus far has been very high. Although the results thus far give me confidence, I am considering to see another 100-170 SNGs before I move up a level. (I lie, I will probably toss in a $33 game here and there)

Comments welcome