This is the context diagram for an automated food production system. The primary mission for the system is to feed humans in extreme environments, (e.g. beneath the surface of the ocean, on the Moon, on Mars, etc.).

Below: The diagram below is a System Requirements Hiearchy diagram for the system.

The diagram on the left is a Use Case Activity diagram for the system.

The image to the right shows a system-level activity diagram of the system.

The image to the left shows the internal block diagram for the layer 2 physical architecture. At this level, the architecture consists primarily of subsystems. At lower levels, the subsystems are decomposed to component and even assemblies and/or parts.