I’ve found that CQRS & DDD can be useful when modelling actual business processes, although it certainly isn’t without its overheard.

The benefit is that it can map nicely onto how existing processes work. You can sit with people in a meeting, they can describe their processes (by something as simple as passing post-it notes around the table), and those post it notes then directly become the basis of your system design.

Not that this is the only way to achieve that, but it is _a_ way.