> You neeed to know what to simulate and what to ignore. And often the fastest and most economical way to find out is to try doing it. Also simulations need n

> You neeed to know what to simulate and what to ignore. And often the fastest and most economical way to find out is to try doing it. Also simulations need not be perfect to be useful. I spent a large fraction of my life writing object oriented simulations of transformers. We simplified everything (reduced detail, reduced number of dimensions, rules of thumb where there was no analytical formula) but still succeeded in designing better transformers than before. The next generation will be more precise and even more useful but you can't always get there in one jump.