Question About the Parameter "DI"

[terry0222]

In the "Help" pages of CVCX the following statement is made about DI :

DI - The desirability index developed by Don Schlesinger is a combination of win rate and standard deviation and is designed to rate the desirability of a situation. A higher DI is better.

Question: The statement "A higher DI is better" is a little vague. Is it reasonable that the DI should "at least be" X value? If so, what is 'X' ?

Any additional insights will be appreciated.

Thanks.

[Freightman]

In the "Help" pages of CVCX the following statement is made about DI :

DI - The desirability index developed by Don Schlesinger is a combination of win rate and standard deviation and is designed to rate the desirability of a situation. A higher DI is better.

Question: The statement "A higher DI is better" is a little vague. Is it reasonable that the DI should "at least be" X value? If so, what is 'X' ?

Any additional insights will be appreciated.

Thanks.

DI^2 = SCORE
SCORE is Likely an easier concept. So,
If DI =6,SCORE =36
If DI =8,SCORE =64
If DI =10,SCIRE=10

Conservative players restricting themselves to better games, will generally not play a game with a SCORE < 50, so, the square root of 50 is ~ 7.1.

More aggressive players will play with lower SCORE's.

[RS]

DI^2 = SCORE
SCORE is Likely an easier concept. So,
If DI =6,SCORE =36
If DI =8,SCORE =64
If DI =10,SCIRE=10

Conservative players restricting themselves to better games, will generally not play a game with a SCORE < 50, so, the square root of 50 is ~ 7.1.

More aggressive players will play with lower SCORE's.

Freightman (hopefully) meant "IF DI = 10, SCORE = 100", not 10.


At least for me, I don't look at DI at all (it's the same thing as SCORE, just the square root of it).

It'd be like looking at EV/round vs EV/hour under the same circumstances -- they are the same thing (essentially).



For "it should be at least 'x' " question -- it all depends on you. Everyone is different as far as bankroll, tolerance to risk, whether it's a hobby or occupation, if they can refund their bankroll, time, if they get anything else out of BJ than just money (ie: comps, enjoyment, free drinks, etc.).


One player might be fine playing a game with a SCORE of 15, because his goal is to enjoy his time out of the house on a friday night, having a small advantage, and getting some comps, the wins and losses don't matter much to this more recreational-like player.

Another player might only play a game with a SCORE greater than 100, because he's trying to increase his bankroll as quickly as possible, even if it means getting backed off frequently.

Another player might only be able to play a game with a SCORE of 30, because he is limited in which casinos he plays, he has to settle for the place where he can spread $1000 to $5000 on a shoe game.



Overall, you gotta look at everything, not just SCORE or DI. Look at them, but also look at EV, SD, ROR, N0, and anything else that piques your interest. The more you play, the more you should get a feel for that type of game (ie: seeing a game with $2k/hour SD on paper is one thing, actually experiencing the ebb & flow is another).

[KZman]

DI=(EV/SD)*100 with EV and SD for 100 rounds.

Score=DI^2 , roughly equal to the expected value in $ for a 10 K Bankroll and 13.5 % ROR,

NO=10^6/(DI^2), NO is number of hands needed to play with a given strategy, to have probability to be ahead equal to 5/6.

[DSchles]

"At least for me, I don't look at DI at all (it's the same thing as SCORE, just the square root of it)."

Just realize, though, that, when comparing the "goodness" of games, if one's DI is twice another's, then the first one's SCORE is FOUR times as good, and it is this latter metric that is the more pertinent one for comparisons.

Don