The most important benefit of a context diagram is that it shows the scope and boundaries of a system at a glance, including the other systems that interface with it. An online food store context diagram, sometimes called a level 0 data-flow diagram, is drawn using EdrawMax in order to clarify the boundaries of the software system. As the image reveals, the entire software system is shown as a single process. An online food store shows how a customer orders the food at the online food store. The request goes to the administrator, who checks the inventory and the customer’s order detail. Once everything looks great to the administrator, they forward the request to the accounts team and then to the shipping agent, who makes sure that the customer receives the desired food order on time.