This paper does not explain the Scrum methodology other than is necessary for the purposes of this paper. For more details on Scrum I recommend starting with Wikipedia:
Scrum is a software development methodology that follows Agile principles. The roots and principles of Agile come from the principles of Lean manufacturing created in Japan by Toyota in the 1980s which in turn pulled from the philosophies of Henry Ford (Wikipedia).
The principles of Agile (Agile Manifesto) are:
It is apparent from this list that the principles of open source and the principles of Agile development have a lot in common. In many cases there is an analogous principle or a close mapping to one.