Fifteen years of theory in project management: a reviewJohnson, N., Creasy, T., & Yang Fan. (2015). Fifteen years of theory in project management: a review. International Journal of Construction Project Management, 7(2), 153–166.
The article reviews the top theories used over the study period were, in order: Fuzzy Sets Theory (FST), Theory of Constraints (TOC), Actor-Network Theory (ANT), Stakeholder Theory, and Utility Theory.