What is the best way for companies to select appropriate portfolios for new product investments?

A$.$ Identify a number of new product projects to be undertaken in the next few years

B$.$ Meet with project teams working$/$worked on each past project

C$.$ Teams need to map, beginning to end, what happened in past project to improve performance on future projects

D$.$ Teams need to rate proficiency for each major activity and all key go$/$kill decision points

E$.$ All of the above