"So that means you develop them at home without testing, you build them onto your car, and you [run them for the first time] on a race weekend - and on a race weekend you have very little time.
"There are all sorts of implications with new ideas and pieces that you put on the car, that you go into a race weekend without experiencing.
"You have very little time to get your experience and naturally due to this you end up with some kind of compromise, so it's a tough way to fight your way through all these development areas that you have to go through."
"If you imagine the level of sport we're celebrating here, the level of financial input, the people, and then you consider it's the only sport in the world that has no testing..." said Schumacher.
"So I think it's quite ridiculous.