I really like Brian’s take on skills where the number of ranks has an important role to play as well as the total bonus.
As I see it there are four types of skill roll in Rolemaster.
All or nothing.
This is the classic pass or fail test. You either heard the cocking of the crossbow or you didn’t. In RM2/RMC you need a total of 101+ to succeed in RMSS/RMFRP it is 111+ (which always struck me as a weird number if eleventy-one works for you then who am I to argue.)
Progress towards a goal