Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
IMO having a over all vibe in your shop that "we All work with a sense of urgency every day" and leading by example is far more valuable over time than telling a catcher needs to box 72 shirts in 3 minutes. Pressing thresholds makes for hurried work.There is never enough time to it right the first time, but, there is always time to do it over again when it has been done wrong.
we have a catcher at end of dryer. As they come out they fold an box up as they are coming off the belt. So when the last shirt comes throught the dryer the order is all set. So we have not spent any time boxing really.