The supply chain of a chocolate bar starts at my desire to buy one – at the customer. To fulfill the customer need, the chocolat bar company has to buy the resources from several different suppliers of raw material: milk, cocoa, sugar etc.. these resources are delivered to the production site on order by a carrier. There the raw materials are processed to a chocolate bar – with different ingredients and flavors from strawberry to pure chocolate. After manufacturing, the goods are stored in a warehouse there before they are deliverd to the first tier customers which are supermarkets and maybe also restaurants and other small stores. Finally, I can buy my chocolate bar in many flavors at the supermarket or everywhere at the university campus.