Dharmashankar Subramanian Pu Huang C. Pulavarthi Jie Xu H. Sekhar S. Zhan S. Tripathi S. Kumar Risk-adjusted approach to optimize investments in product development portfolios. 9 2010 54 IBM Journal of Research and Development 3 http://dx.doi.org/10.1147/JRD.2010.2044617 db/journals/ibmrd/ibmrd54.html#SubramanianHPXSZTK10