This great article from 2011 by Gerry Katz provides us with an overview of the different models that have been developed around innovation processes and New Product Development. In short:
— 1980: New Product and Development Service Process (Hauser)
– 1986: Stage Gate (Cooper)
– 1992: Innovation Funnel (Wheelwright & Clark)
– 1992: New Product Development Funnel (McGrath)
– 2005: Innovation Funnel (MIT)

And he proposes a new design in the end. The article, however, misses the evolution of Open Innovation.

Read full article: Where does ‘The Innovation Funnel’ come from? A short history.