Project management methodologies’ popularity has increased throughout the passage of time and is being more and more spread and used in many projects in different sectors. The last research and innovation programme funded by the European Union named “Horizon 2020” has implemented these methodologies as a requirement to grant funds to the consortiums that participate on the different call for proposals. The aim of the present investigation is to find empirical evidence to establish whether there exists a correlation between the perceived usage of project management methodologies and project success in these projects and determine which is that correlation. For that purpose, a questionnaire based on Project Management Methodology PM² Guidebook, which is the manual chosen by the European Commission for this programme, was properly developed and validated, to be used as the data collection tool to gain additional insights into these projects and draw conclusions regarding the study concern.