Scrum is an incremental framework or technique that helps is systematic commencement and development of various types of software products in an iterative fashion, and is a derivative of Agile Methodologies.
Bharani Manapragada, V. S. P. C. (2013). Software Product Development—an Approach Using Scrum. International Journal of Engineering and Computer Science, 2(09). Retrieved from http://ijecs.in/index.php/ijecs/article/view/1907