A waitress who need the skill or expertise in the work? For example, to scoop food from a big bowl, the guest by lap and hard, using cutlery and plates with 3-4 leaves are the food without feeding six, etc.
The waitress that require specific skills or expertise in the work done in a way, for example, lap by lap guests from a large bowl and using a heavy utensils and holding a plate of food with a 3-4 card. not to feed six, etc.
A good waiter have specific skills or expertise in work, for example, scooping food to guests by the plate from the bowl big and heavy, using a fork. And holding plate 3-4 leaves with the food without feeding six.