Index -> Playing the Game -> Mission Phase -> Resolving the Current Mission -> Determine Success or Failure
If the total skills contributed by the assigned characters are equal to or greater than the difficulty of the mission (as increased by the obstacles, adversary, and complications there), the hero player succeeds at the mission. If not, he fails.
Jason has a total of 8 Combat assigned to Supply Raid. The mission's difficulty, including the obstacle and the complication Paul played there, is 7. Jason succeeds at the mission.