Epistemological perspective of project management.

From the epistemological point of view, is project management lies in between positivism and constructivism?

If we talk about contstructivism, project management practitioners could contribute to new theories through their practices. Vice versa, from positivism angle, researchers without involving in projects could derive new project management theories that influence practices through rigourous research. ie. it is loop: practice -> research -> practice -> research -> .....

What's your view?