Saw this from another site, made sense, :
"In crafting, you buy green recipes from vendors. Then you must reverse-engineer the greens you make (like disenchant in WoW) to discover the blue recipe (luck based, but it usually doesn't take long). Once you learn the blue, do the same thing to learn the purple version of the recipe.Some of the reverse-engineered purple recipes have multiple versions too. You might learn the crit version of a gun, if you keep RE'ing the blue you can learn the others too.
I heard many people complain that crafted items weren't very useful that didn't realize you can basically keep yourself decked out in leveling purples if you put the time in. Its a critical part of the crafting system that is never really explained"
Also, Companions can queue up crafting up to 4 or 5 times.