Hi Wendy:
One method to determine weight is to weigh your course objectives as to importance. Then, base your comonent weight for grading on how much of the courcse focused on a particular objective.
Similarly, another metod is to weigh according to practice in the field. I suppose a great chef who takes all day to make a simple dish would not be up to performance standards. So weighing timeliness might have a higher degree of weight, or maybe equal with correct preparation of the dish.
Regards, Barry