Just some stuff I read for my exams!

http://en.wikipedia.org/wiki/Research_and_development

http://www.bizfilings.com/toolkit/sbg/marketing/product-development/generating-new-product-ideas.aspx

http://www.stage-gate.net/downloads/working_papers/wp_29.pdf

http://www.tutor2u.net/business/strategy/bcg_box.htm

http://www.prod-dev.com/portfolio_management.php

and many many maaaany more....
join my suffer..please do!