UML isn't taught that way any more. It's still mandatory in programming courses and waterfall(ish) programming projects, but it's also emphasized that iteration

UML isn't taught that way any more. It's still mandatory in programming courses and waterfall(ish) programming projects, but it's also emphasized that iteration with clients is a good thing if you can do it, that the clients don't actually know that they want, that you're unlikely to get your software right the first time, and that 90% of software projects end up failing anyway.