This is an academic paper (about 45 pages). Illustrates well enough the challenges we face,  when trying to “manufacture serendipity” in large organizations. Very good real-life comments from interviews, good diversity of interviewed business areas. Technical guidelines shown – of course the serendipity engine is highly confidential – maybe useful for those interested in application development. Serendipity’s role in organizational innovation management  well  described, but only in large enterprise context.

http://www.ischool.berkeley.edu/files/student_projects/smartsparq_paper_final_1.pdf