So the metric they use is like this: every drink has a hidden "labor" number (let's call it x) that is assigned depending on how difficult, or labor intensive, it is. And a drink's x value goes up when you ring in different modifiers. So drinks like water have a low x value while drinks like Frappucinos have a high one. And modifiers such as "steamed" or even hitting the "add ice" button for water will increase the x value. This is why it is so important to ring things up correctly and to always make sure you check to see if there is a button before just putting it in an ask me (i.e. there is a "pour on top" button that a lot of people don't know about). At least that is how it was explained to me

Yeah we’ve just had some troubles with our manger not scheduling correctly and one girl ‘transferred’ (long story as apparently she’s trying to sue) and I was told she was only scheduled as an extra however when she doesn’t show my ASM says we’re short staffed. I just am not sure what’s considered short staffed or not here lol thank you though