After specifying the calculation sequence for the project, assign it to all or part of the scenarios in the Project view. If you activate several scenarios, Visum will automatically load the scenarios in the sequence selected and will perform the respective calculations. This function is very helpful if you have to carry out numerous calculations, e.g. overnight, and no interaction is required. Moreover, you can distribute scenario calculations across multiple computers to exploit the computing power available (Distributing calculations to several computers). After all calculations have been performed, Visum saves the model state with all results to a version file in the project directory. Saving the results of each scenario to a separate version file might seem like a "disruption" of scenario management, but this is the only way to save the many results (e.g. assignment results) in a compact form.
In the Project view, the scenarios for which calculations have been performed are marked "Calculated". If, after scenario calculation, you change the base version, its modifications, the calculation sequence or the number of modifications, Visum will reset the status to "Calculated (not up-to-date)". The results version file then still exists, but the results might no longer be up-to-date and you should have the calculation performed again.
If you run calculations of scenarios in multi-user mode, all modifications and scenarios used within are locked for further editing by other users.
