Is 'at full capacity' only used when referring to machinery or humans as well? Would you say it is correct?<br/><br/>I'd rather work to full capacity the few days I do show up for work than work at 50% of capacity everyday like you. <br/><br/>Do you write 'to full capacity' or at full capacity'<br/><br/>'work at 50% capacity' or 'work to 50% capacity' or work at 50% of capacity' or 'to 50% of capacity'?