Entities are discrete objects that can traverse a simulation model or network. They can be used to represent physical or conceptual items in your model such as cars in a traffic model, telephone calls in a telecommunications system, customers in a retail environment, and so on. You can use various Simulation Studio blocks to assign attributes to entities as they flow through your simulation model and use other blocks to read entity attributes and act on them.

When you have the animation feature turned on in Simulation Studio, you can view the movement of entities through your simulation model while it is executing. If the Tracer is enabled, entity information is also displayed on the Trace tab in Simulation Studio.