If you were to build a complex distributed system, there are no tools to help model it short of building it. This is vastly different than, for example, buildin

If you were to build a complex distributed system, there are no tools to help model it short of building it. This is vastly different than, for example, building a bridge, where we can use math and science encoded into computational processes to be able to model a bridge and then simulate it's behavior under varying conditions. Same with most other fields of science and engineering that are starting to leverage computing.