Usability and findability are simply different aspects of design, and you can have one without the other.

Who does design and who does testing is another issue altogether, and represents a minefield that I hesitate to wade into. Perhaps traditional usability engineering was more focused on testing and evaluation, but dammit, that gets old, and it's hard to resist the siren song of design. And while information architecture has been more oriented toward design, you can't avoid the need to test and validate those designs. So there is certainly an increasing convergence between what usability engineers, information architects, and many, many other user experience professionals are doing.

"Lou Rosenfeld & Peter Morville Interview," since1968.com, Oct 2002 via Tomalak's Realm

1:45:31 PM