Ideally, simulate them. This is a way to Verify ideas before implementation and to ‣.
See SysML, ‣.
When the system is too big and complex to model in full, only ‣.
To buy information even quicker than via modelling or simulation, ‣.
To model and simulate is one of the ways to ‣.
Form energy modelled grid decorbanisation demand to find the optimal specs for their energy storage systems: https://formenergy.com/technology/grid-modeling-toolkit/.