There are funny task orders. For example: Wash the hair. Dry the hair. Paint the hair to ombre style. Wash off paint. Apply conditioner. Dry the hair. Straighten the hair. Cut the costumer bald. (ok, it is not stupid if the hair goes to donation)

In practice hairdressers order and merge tasks for efficiency. For example: cut first, then paint. If the hair is already wet from washing, no need to dry and wet it again. Such stuff.