It doesn't really matter the methodology used, but there is always (should be?) some written design, requirements, or specification somewhere. I've only ever been on "corporate" type projects where lots of stuff has been defined in advance. I find it really nice, because I can focus on implementing things, not designing, envisioning, or winging things. While malleable to some extent, it's not like a new concept could be inserted.

It might also help to know who this product is for. Is it a B2B/internal or B2C project?