Originally Posted by Chrome Prince

Hi Beans,
System Viability is the profit divided by the Maximum win dividend and profit divided by the Maximum place dividend, you'll see this on the summary. A system viability of 1 means there's very little chance of the system being long term viable as all the profit comes from one big winner. For any system you'll want at least double figures in system viability depending of course on the number of bets or qualifiers.