1. WHAT IS A Context Diagram?
Illustration of the system boundary in its environment, and the external entities (e.g., people and other systems) that supply and receive information or materials to and from the system boundary
Also known as:
Scope Diagram

2. EXAMPLE

3. Step 1: Identify System Boundary
Select an entity as a focal point
Draw a circle
Label the system boundary

4. Step 2: Identify User Roles
Identify the entities that have direct interaction with the system boundary
Draw a rectangle
Label each role

5. Step 3: Information Flow
Draw lines with arrowheads to show direction flow of information or material
Inputs to the System Boundary
Outputs from the System Boundary