I've set up patient appointments by putting their reservation times into Time so that patients are created at those times. But I also want to create patients who come early, so I'm thinking of putting an empirical distribution into the offset. Is this the right approach?
No that field is just the offset before all the times start. You should use the DateTimeSource activity and the Offset field for each arrival:
@Jason Lightfoot Thank you for your answer.
If you insert -1*Empirical() into 'Offset / Variability', does it mean each generated patient will be created earlier than the given time? And it will vary for each patient, right?
It will be earlier if you give it a negative value. However if that is before the simulation start time then I believe the arrival is discarded so if you want those to be included you should use for example:
Math.max(0, uniform(-10,4,getstream(activity)))
@Jason Lightfoot Does that mean, if the value is negative number it will be set to 0?
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