In a discrete event model, you can control the order that time ties (two or more events occurring at the same time) are processed. ExtendSim will put the blocks on the event calendar in simulation order. Blocks with a lower simulation order will receive their event message first. You can change the simulation order with the following steps:
Note, the simulation order will only make a difference if two or more events occur at exactly the same time. If the events are not exactly at the same time, events will occur in chronological order.