I've seen a similar model that I've adopted for my own projections which is 30/60/90 - the 30% chance scenario which is highly successful but less likely, 60% c

I've seen a similar model that I've adopted for my own projections which is 30/60/90 - the 30% chance scenario which is highly successful but less likely, 60% chance scenario that is good with a relatively decent chance of success, and the 90% chance scenario that is the lowest outcome but will almost certainly happen.