Change Random Numbers and Run
To allow you to analyze the effect changes you make have on your simulation by default Simul8 keeps the random seed number the same for each run. This way you can be sure the effect is a result of the change you have made rather than a change in variability.
However once you have decided on your final scenario and to properly validate your simulation it is useful to change the random seed number to ensure your simulation still behaves as you expect.