At best, SCRUM is a sub-Agile method, which assumes all project memebers are dedicated, and in same location. The Product Owner is CRITCAL component on a SCRUM project. And this is where SCRUm can go awry – if the project has a Product Owner who is not sufficiently enaged with the project, or lacks skills to make good judgement calls on user stories.
Scrum is an Agile development framework that Jeff Sutherland invented at Easel Corporation in 1993. Jeff worked with Ken Schwaber to formalize Scrum at OOPSLA’95. Together, they extended and enhanced Scrum at many software companies and helped write the Agile Manifesto.