Suppose you have been assigned to evaluate different ways of delivering milk to customers. The more energy you conserve, the cheaper your product can be. Remember that work is directly tied to free energy. Your goal is to minimize wasted free energy. Think of all the ways that milk could be delivered, the kinds of containers that could be used, the ways they could be transported, and whether the containers could be reused (refilled) or recycled. Determine what kinds of information you would need to collect, how you would need to analyze the information, and some criteria you could use to decide which systems are most efficient in their use of free energy. (Do not try to collect the actual data you would use, but define the problem well enough so that someone could collect the necessary data based on your description of the problem.)