Just ending 22 weeks on the Miller MTO.

I understand MTO takes time but....
How much time is really involved, start to finish, in making up a pair of shoes? I should think it is a matter of weeks, not months.
It seems what makers are happy to do is to take orders and then stack up the production schedule months out. At some point, you would think that they would have to expand production capacity or stop taking orders until the backlog starts to go down.