I have no clue how to do this, can someone help me? I have two sources with different exponential values for the inter-arrival time, however i need to make one start at 8 am until 12, while the other needs to start at 12 until 19. I don't know how to set a start and end time for each source, both start and end with the simulation, however i need them to start and finish when i need them to. It´s not a schedule arrival because i need to use inter-arrival time and not a schedule time to arrive a certain amout of products. Thank you in advance to whoever helps me.