Tyler MumfordI'm looking at http://agilemanifesto.org/principles.html and I think I understand all except
"Working software is the primary measure of progress." This one seems less specific and actionable than the other principles.
Javier
: j@fabrica:~/src; 
@tylermumford Architecture specs, unit tests, design mockups are not working software. They may be valuable in creating working software, but only working software is the product.
Personally, I’ve come to add “tested hypotheses” to the things that count as progress. Software that “works” but turns out to be the wrong approach is an invalidated hypothesis.
"They may be valuable in creating working software, but only working software is the product."
Well said. And I also agree about testing hypotheses as a form of progress. I think it's valuable to think that way.