A hospitality-logistics subsystem primarily involves optimising the flows of goods, information and people, and its products include food and beverage services and accommodation services. How high the quality and how low the price of the food and beverage service will be depends on the extent to which the logistics system is capable of optimising the flow of material, semi-products and finished products needed for the end product. Mostly, this refers to physical flows from a supplier, across production (preparing food) to a consumer (tourist). As mentioned earlier, the spatial coverage of flows may vary with the application of logistics chains and networks.