What is that difference? In IT, I'd imagine that no person in his right mind would choose to implement s/w dev in the method defined in the PMP. There is scrum,

What is that difference? In IT, I'd imagine that no person in his right mind would choose to implement s/w dev in the method defined in the PMP. There is scrum, agile, rup and dozens more processes. I guess, does a PMP say that you have managed s/w projects and you know the process. In the same way that a graduate in IT can prove that he has studied the field.