Among recipes in the game, there are those for which the rate of progress and chance of success are increased by higher Craftsmanship, and those for which they are determined by Magic Craftsmanship. Control helps to reduce the occurrence of aetherial sparking (see below), and exerts its influence over both types of recipes just mentioned.
All recipes, however, have set attribute requirements. Attempting a recipe with attributes below those required will result in lessened progress and quality, even for successful actions.
It was also recently added that Control will help prevent/stabilize elemental instabilities.