Wastefulness, practicality, etc. is pretty Te-ish I think.
Socionics function: black logic - profit - business logic
external activity of object - actions, events (what, how, where), facts, activity or work, algorithms, procedures, logic of objects’ measurable outward behavior
Positive(short range):
Advantage, benefit, profitability, technology, the facts, purchases, accumulation, the purchase, savings, putting in order, a practicality;
Negative (long range):
Uselessness, unprofitableness, use, application, deterioration, charges, expenditure, risk, experiment, sale, trade, actions in conditions of chaos, an ingenuity.
Assuming you're ILE, that would be your 8th function.

Function of Concrete Art
strong
producing

Your function of concrete art is a function which automatically creates for yourself and helps others with. You typically are not even aware of this function as a skill.