Very thanks for your reply.
But Gregtech has introduced one new thing,smelting crucible.The NPC seems do badly in planning raw material ratio(especially the recipe of steel and alloy).They will let the last raw material to affect the outcome of the next procession.
Also,in chemical industry,there are many kinds of fluid.Sometimes the raw material will remain, which will occupy the input slot, meaning that the later material can not enter.
So giving NPCs ability of empty the containers initiatively is also needed.But sometimes these remaining ingredients are only temporarily useless.This seems to need to be considered.