There are things you can't simulate (yet). In my experience it's beneficial to run real live testing to gather data about individual parts themselves. For examp

There are things you can't simulate (yet). In my experience it's beneficial to run real live testing to gather data about individual parts themselves. For example, I had a robot's navigation fail when it encountered a certain type of water container (one gallon type in a given color found in US supermarkets). Like kissing, you can't replace the real thing.