Term: Average DC, set

Difficulty Class / DC by way of a set amount, using pre-determined numbers as an easy way to understand how hard something is and/or should be. A more nuanced version of this would be Average DC, by Level

Challenge / Difficulty	CHASE DC	Difference	Traditional DC
Very Easy / Untrained	10	+5	5
Easy / Trained	15	+5	10-14
Moderate / Expert	20	+10	15-19
Hard / Master	30	+10	20-24
Very Hard / Legendary	40	+15	25-34
Nearly Impossible	50	+!5	35