The timetable-based PuT assignment determines connections for each OD pair and carries out a route choice of the demand. It is often not carried out capacity-dependently. Due to these properties, the individual OD pairs are not interdependent and it is possible to perform the calculation separately.
For this, external compute nodes can be selected on which the relations are divided according to origin zones. The computers receive the corresponding number of origin zones proportional to the processors available to them. The total run time of a larger timetable-based assignment is reduced considerably. The run time scales with the number of selected calculation cores.
You can use this functionality if the connections are independent of each other. This is not the case if capacity restrictions are taken into account or sharing services extend the public transport supply.
How to use the function is described in the user manual (Using Visum: Specifying compute nodes for procedure calculation)
