dev-docs/Introduction-+-Overview.md

-
 ## Projects overview
 
-TODO
-
 - Commons
 - Simulation
-  - Sub-projects
+  - Environment
+  - EESimulator
+  - Vehicle
+  - EEComponents
+  - Simulator
 - hardware_emulator
 - basic-simulator
 - server
 - visualization
-- emadl-maven-plugin
 
-## Structure
+## Overview Diagram
+
+The following diagram shows the main classes of the simulator, how they interact and in which project they are located (or sub-project for `simulation`).
+
+The relations between the classes **are illustrative**. They intent to give an overview of the main interactions, but are not formally defined and **not exhaustive**. Also **not represented** is how the simulator can be used in the context of the `server` project.
 
-- Concepts: discussion on general concepts, concepts that are used across all projects.
-- Per project:
-  - Details on the implementation/development of individual pieces of the projects.
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+![Interaction and location of the main classes in the simulation](/img/dev-docs/overview.svg)
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