A Material Delay can be assigned an Initial Outflow (the default is zero). The ability to do so is important since the actual processes that you will be simulating may not necessarily start when your simulation begins.
In many cases, the process may have been ongoing for some time prior to the start of the simulation. As a result, your Material Delay (e.g., an assembly line, an aquifer, a pipe) probably already contains some material (and is outflowing material) at the start of the simulation.
GoldSim allows you to specify the Initial Outflow for a Material Delay. The Initial Outflow is related to the initial amount of material in transit by the following equation: