How would you go about implementing indie-style fail/partial success/success resolution into a d20 system (D&D 3.5, Pathfinder, etc). Looking for quick, simple, elegant house-rule type solutions, requiring little-to-no modification of other rules and stats.
A target range rather than a target number (in the range partial success, beat the range success), maybe? How to determine the appropriate range? Should the partial success range be below the DC/AC as written, or above it?
This is mostly just out of curiosity, but I am getting a bit sick of binary results in my Pathfinder game. I want some compromised successes and hard bargains!