A “context”, “scope”, or “system context” diagram models the project product or major deliverable by a simple representation of it in its key business contexts. These contexts are a) the main human nd-users and b) the (non-human) systems that interface with the product. To represent the interfaces (i.e. channels or media) connecting users to product, arrows are nice but not necessary (since the diagram is to represent a structure rather than flow(s)). There is no modeling of what is “inside” the project product.”