The default basic modeling template that Simulation Studio provides contains two blocks capable of generating entities: the Entity Generator block and the Clone block. These blocks are described in Appendix A: Templates. Entity Generator blocks are usually the primary source of entities in your simulation models. You can specify the quantity and type of entities that you want your Entity Generator blocks to generate. If more than one entity is being generated, you need to have a connection to the Entity Generator block’s InterArrivalTime input port so the Entity Generator can determine when to schedule the next entity creation event. You can create multiple entities at each entity creation event by using the BatchSize input port on the Entity Generator block. (See the Entity Generator details in Appendix A: Templates.) There is no limit on the number of Entity Generator blocks that your simulation model can contain, and the limit on the number of entities of a given type that you can generate is the Java programming language value Integer.MAX_VALUE.