Read the attached article: When Experts Play it Too Safe: Innovation Lessons from a NASA Experiment, By Rachel Layne dated Sep $12$th

Based on this research, should company $$experts$$ be excluded from the entire innovation process, or just specific types of innovation?

Given the $3$ innovation levers $($Incremental$,$ Semi$-$Radical and Radical$)$ AND THE NATURE OF EACH INNOVATION, to which lever is a company $$expert$$ most likely to provide the most constructive input? The least$-$constructive input?