The 5th International Ph.D. Colloquium is an event of the System Dynamics Student Chapter. The objective of the colloquium is to bring together Ph.D. Students working on foundations, techniques, tools, and applications of System Dynamics and give them the opportunity to present and discuss their research in a constructive and international atmosphere. The Colloquium will also provide an opportunity for student participants to interact with established faculty and others in the wider system dynamics community. The diversity and the interactive setting should provide a unique learning opportunity for all participants of the colloquium. This year, the all-day colloquium will open with a speech given by Professor Repenning. The colloquium will consist of number of sessions with oral presentations followed up by parallel workshops, as well as a large poster session in the afternoon. We have received more that 20 submissions and we believe and hope it will be an interesting day with many fruitful discussions.