THANKS FOR DOWNLOADING THIS PAPER. This is a post-refereeing version of a manuscript published by Elsevier. Please, in order to cite this paper properly: Ballesteros-Pérez (2017) “Modelling the boundaries of project fast-tracking.” Automation in Construction, 84 (December 2017), pp. 231–241. https://doi.org/10.1016/j.autcon.2017.09.006 The authors recommend going to the publisher’s website in order to access the full paper. If this paper helped you somehow in your research, feel free to cite it.