Ability to perform scheduled update during testrun

When creating a project with complex calculations, the calculation time may require a user to use a scheduled update rather than a direct calculation, so that it can be run in such a way that it does not interfere with short-term use of other calculations. However, when working with future plans, and thus a testrun, the option for scheduled calculations are not available. As an urban planner/consultant, I would like the ability to use a scheduled update while in a testrun, so I can test future design plans in the context of context calculation models without modifying the current situation.