Our Team

The Data and Decision Sciences Lab is composed of top-tier researchers with years of experience in data science, operations research, and statistics projects.

Fabio Vitor, Ph.D.

Assistant Professor

Ph.D., Industrial Engineering, Kansas State University, 2019                                        
M.S., Operations Research, Kansas State University, 2015                                           
B.S., Industrial Engineering, Maua Institute of Technology, 2013

Contact Information

  • ftorresvitor@unomaha.edu
  • (402) 554-2691


Department of Mathematics
Durham Science Center
6001 Dodge Street, Omaha, NE 68182
Office: DSC 239

Research Interests

  • Operations Research
  • Optimization Modeling
  • Mathematical Programming
  • Optimization Algorithms

Academic and Professional Experience

Fabio joined the Data and Decision Sciences Lab and the department of Mathematics at the University of Nebraska at Omaha as an Assistant Professor in 2019. He received a Ph.D. in Industrial Engineering and a M.S. in Operations Research from Kansas State University, and a B.S. in Industrial Engineering from Maua Institute of Technology, Brazil. Fabio also has around 10 years of industry experience. He worked for companies such as Monsanto, Kalmar (Cargotec Corporation), and Volkswagen. He also participated in the Google Summer of Code program as a student developer.

Fabio’s research includes both theoretical and applied topics in operations research. His theoretical research creates algorithms to more quickly solve continuous and discrete optimization problems such as linear, nonlinear, and integer programs. For instance, Fabio developed multidimensional search simplex and interior point methods for linear programs as well as cutting plane techniques and branching strategies for integer programs. Some of his applied research involves the application of optimization models and other operations research tools to reduce inventory costs, improve delivery routings, optimize nursery planting allocation, improve airport operations, and create strategies to overcome human trafficking.

Fabio is a recipient of the Nebraska EPSCoR FIRST Award, which is supported by the National Science Foundation to advance the research of early-career tenure-track faculty. During his Doctoral studies, Fabio received the K-State 2025 College of Engineering Fellowship for two consecutive years. He also received several awards during the time he worked for Volkswagen, including the second place in the Best Apprentice Award. Fabio is a member of the Institute for Operations Research and the Management Sciences (INFORMS), the Institute of Industrial and Systems Engineering (IISE), the Society for Industrial and Applied Mathematics (SIAM), and the Mathematical Optimization Society (MOS).

Selected Publications

Bailey J. P., Easton T., and Vitor F., Octanary Polyhedral Branch and Bound for Integer Programs,  International Journal of Operational Research (in press).

Vitor F., and Easton T., Approximate and Exact Merging of Knapsack Constraints with Cover Inequalities,  Optimization, advance online publication (2020).

Vitor F., and Easton T., The Double Pivot Simplex Method, Mathematical Methods of Operations Research , 87(1), 109-137 (2018).

Vitor F., The Ratio Algorithm to Solve the Optimal Basis of Two Constraint Linear Programs,  Proceedings of the 2018 IISE Annual Conference, 1949-1954 (2018).

Vitor F., and Easton T., A Two Dimensional Search Primal Affine Scaling Interior Point Algorithm for Linear Programs,  Proceedings of the 2018 IISE Annual Conference, 1961-1966 (2018).

Vitor F., Antunes V. A., and Chwif L., Warnings about Simulation Revisited: Improving Operations in Congonhas Airport,  Proceedings of the 2016 Winter Simulation Conference, 2418-2429 (2016).

Vitor F., and Easton T., Merged Knapsack Cover Inequalities for the Multiple Knapsack Problem,  Proceedings of the 2016 Industrial and Systems Engineering Research Conference, 607-612 (2016).

Current Students Advised

Nishi Mahato

Graduate Student

Research: On the Implementation of Multidimensional Searches into a Simplex Solver
Nebraska EPSCoR FIRST – National Science Foundation

Daniel Faronbi

Undergraduate Student

Research: On the Implementation of Multidimensional Searches into an Interior Point Solver
Nebraska EPSCoR FIRST – National Science Foundation

Sydney Meier

Undergraduate Student

Research: Developing a Discrete Event Simulation Model to Overcome Human Trafficking

Isidore Jeovanis Sossa

Undergraduate Student

Project: Optimizing the Delivery of Meals and Food Pantries to Seniors in Omaha, NE
Intercultural Senior Center

Samantha O’Rourke

Undergraduate Student

Collaborator: United States Air Force in Europe

Andrew Pace

Undergraduate Student

Collaborator: Roadrunner Transportation

Past Students Advised

Adel KabiriKopaei

Graduate Student

Josep Maria Mateu Benesey

Graduate Student

Project: Developing a Mixed Integer-Linear Optimization Model to Reduce the Inventory of Pet Food Products
Piensos Picart