Dr. David Willems

Collaborative researcher


Since 2021:

Head of Department A 5 Medical Ergonomics and Applied Computer Science, Bundeswehr Institue for Preventive Medicine

Department B 4.1 Standardized Health Reporting, Specialised Media Processing, Bundeswehr Institue for Preventive Medicine

2013-2019Research associate Mathematical Institute of the University Koblenz-Landau, Campus Koblenz
Education:PhD in Mathematics at the University Koblenz-Landau.
Title: "Exploring aspects of multicriteria and network optimization: applications to civil security and urban events"

Main research interests: Multicriteria optimization, network optimization, approximation algorithms

 Studies at the University Koblenz-Landau, Campus Koblenz

Selected publications

Biedermann, D. H., Torchiani, C., Kielar, P. M., Willems, D., Handel, O., Ruzika, S., & Borrmann, A. (2016). A hybrid and multiscale approach to model and simulate mobility in the context of public events. Transportation Research Procedia, 19, 350-363.


Figueira, J. R., Fonseca, C. M., Halffmann, P., Klamroth, K., Paquete, L., Ruzika, S., ... & Willems, D. (2017). Easy to say they are hard, but hard to see they are easy—towards a categorization of tractable multiobjective combinatorial optimization problems. Journal of Multi‐Criteria Decision Analysis, 24(1-2), 82-98.


Halffmann, P., Ruzika, S., Thielen, C., & Willems, D. (2017). A general approximation method for bicriteria minimization problems. Theoretical Computer Science, 695, 1-15.


Schulze, B., Stiglmayr, M., Paquete, L., Fonseca, C. M., Willems, D., & Ruzika, S. (2020). On the rectangular knapsack problem: approximation of a specific quadratic knapsack problem. Mathematical Methods of Operations Research, 1-26.