Frederico R. B. Cruz

Research Interests

• Operations research, queueing systems, industrial statistics.

Employment

• Aug. 1997–present: Professor, Universidade Federal de Minas Gerais, Brazil.
• Mar. 1997–Jul. 1997: Visiting Professor, Pontifícia Universidade Católica de Minas Gerais, Brazil.
• Dec. 1991–Feb. 1993: Assistant Professor, Universidade Federal de São João del Rei, Brazil.

Editorial Activities

• Associate Editor, American Journal of Mathematical and Management Sciences, 2023–present.
• Advisory Editor, Queueing Models and Service Management, 2016–present.
• Editorial Board Member, Production (ABEPRO), 2012–present.
• Editorial Board Member, Mathematical Problems in Engineering, 2018–2019.
• Editorial Board Member, The Scientific World Journal, as part of the journal's Operations Research subject area, 2013–2016.

Responsibilities include handling peer review, editorial decisions, and coordination with reviewers and authors.

Education

• Sep. 2007–Jul. 2008: Visiting fellow at the University of Nottingham, UK.
• Aug. 2001–Jun. 2002: Research scholar at the University of Massachusetts at Amherst, USA.
• Mar. 1993–Feb. 1997: Doctor Degree (DSc) in Computer Science from the Federal University of Minas Grais, Brazil. Dissertation title: "Algorithms for Network Design Problems (in Portuguese)".
• Sep. 1994–Jan. 1996: Visiting doctoral student at the University of Massachusetts at Amherst, USA.
• Mar. 1989–Ago. 1991: Master's Degree (MSc) in Computer Science from the Federal University of Minas Gerais, Brazil. Thesis title: "An Algorithm for Hierarquical Network Design (in Portuguese)".
• Ago. 1983–Jul. 1988: Bachelor Degree (BSc) in Electrical Engineering from the Federal University of Minas Gerais, Brazil (first class honors).

Awards and Honors

• IIE Transactions on Design & Manufacturing, Best Paper Award for the focus issues on Operations Engineering for 2004–2005.

• CNPq (last 10 years):

  • Research Fellowship, #305442/2022-8. Research fellowship from the CNPq of the Ministry for Science and Technology of Brazil, from Mar. 2023 to Feb. 2027.
  • Research Fellowship, #305515/2018-7. Research fellowship from the CNPq of the Ministry for Science and Technology of Brazil, from Mar. 2019 to Feb. 2023.
  • Research Fellowship, #304671/2014-2. Research fellowship from the CNPq of the Ministry for Science and Technology of Brazil, from Mar. 2015 to Feb. 2019.

• FAPEMIG (last 10 years):

  • Research Fellowship, #CEX-PPM-00564-17. Research fellowship from the FAPEMIG of Minas Gerais State, Brazil, from Oct. 2017 to Feb. 2024.
  • Research Fellowship, #CEX-PPM-00013-14. Research fellowship from the FAPEMIG of Minas Gerais State, Brazil, from Aug. 2014 to Jul. 2016.

• CAPES:

  • Post-doctoral Fellowship, #BEX 0522/07-4. Post-doctoral fellowship from CAPES of Brazil, to fund research activities at the University of Nottingham, UK, from Sep. 2007 to July 2008.

Research Leadership and Impact

Extensive experience in statistical inference and queueing systems, with a strong publication record in leading journals. Active involvement in editorial processes across multiple journals, contributing to peer-review management and publication quality. Ongoing engagement in both classical and Bayesian methodologies, as well as emerging data-driven approaches.

Publications

Journal Papers (last 3 years):

1. Optimal Resource Allocation in Networks of General Single-server Finite Queues (with G. L. Souza, A. R. Duarte, and G. J. P. Moreira), Journal of the Brazilian Computer Society (in press), Dec., 2026. [pdf] [doi]
2. Performance Measure Estimations in Erlang Single Server Queues (with E. S. Gomes, R. C. Quinino, and S. K. Singh), Communications in Statistics - Simulation and Computation (in press), Apr., 2026. [pdf] [doi] [free to view via @tandfonline]
3. Estimating Changes in Traffic Intensity for Markovian Finite Queueing Systems: A Bayesian Perspective (with S. K. Singh and J. F. R. Aguirre), International Journal of System Assurance Engineering and Management, v. 16, n. 7, p. 2467-2479, 2025. [pdf] [doi] [ ]
4. A Bayesian Approach to Determine Sample Size in Erlang Single Server Queues (with L. Singh and E. S. Gomes), Communications in Statistics - Theory and Methods, v. 54, n. 12, p. 3692-3710, 2025. [pdf] [doi] [free to view via @tandfonline]
5. A Greedy Post-processing Strategy for Multi-objective Performance Optimization of General Single-server Finite Queueing Networks (with A. R. Duarte and G. L. Souza), Soft Computing, v. 28, n. 17-18, p. 9483-9494, 2024. Jul., 2024. [pdf] [doi] [ ]
6. Classical and Bayesian Estimations of Performance Measures in a Single Server Markovian Queueing System Based on Arrivals During Service Times (with S. K. Singh, E. S. Gomes, and A. D. Banik), Communications in Statistics - Theory and Methods, v. 53, n. 10, p. 2517-3546, 2024. [pdf] [doi] [free to view via @tandfonline]
7. Nonparametric Estimation for Multi-server Queues Based on the Number of Clients in the System (with V. B. Quinino and R. C. Quinino), Sankhyā A, v. 86, n. 1, p. 494-529, 2024. [pdf] [doi] [ ]
8. Change Point Estimation of Traffic Intensity in M/M/1/m Queues: A Bayesian Approach (with S. K. Singh, G. M. B. Cruz), Applied Mathematics and Computation, v. 465, p. 128423, 2024. [pdf] [doi] [Elsevier's Share your Article]

Journal Refereeing (selection)

4OR, Annals of Operations Research, Applied Mathematics and Computation, Brazilian Journal of Probability & Statistics, Computational Statistics & Data Analysis, Communications in Statistics–Theory and Methods, Communications in Statistics–Simulation and Computation, Computers & Industrial Engineering, Computers & Operations Research, European Journal of Operational Research, Heliyon, IEEE Transactions on Automation Science & Engineering, IEEE Transactions on Automatic Control, IIE Transactions, International Journal of Systems Assurance Engineering and Management, Journal of Computational and Applied Mathematics, Journal of Statistical Computation & Simulation, Mathematics and Computers in Simulation, Operational Research–An International Journal, Heliyon, OR Spectrum, Physica A: Statistical Mechanics and Its Applications, Production (ABEPRO).

Thesis Topics (last 10 years)

• E. S. Gomes (MSc), "Determination of Moments of the Maximum Likelihood Estimator for Erlang Queues and Single-Server Markovian Queues", 2024 (see the paper [pdf] [doi]).
• A. C. Neisse (MSc), "Chronic Fatigue Syndrome and Absenteeism: A Study of Shift Workers Comparing Stepwise and Elastic Net", 2020 (see the paper [pdf] [doi]).
• L. A. Pereira (DSc), "Emergency Evacuation Models Based on Cellular Automata with Route Changes and Group Fields", 2016 (see the paper [pdf] [doi]).
• H. S. Martins (MSc), "Modeling and Optimization of Finite Queueing Networks", 2016 (see the paper [pdf] [doi]).
• M. A. C. Almeida (DSc), "Inference in Finite and Infinite Markovian Queues", 2016 (see the papers [pdf] [doi]; [pdf] [doi]; [pdf] [doi]).

Invited Lectures

• Department of Mechanical & Industrial Engineering, The University of Massachusetts at Amherst, USA, Fall 2001. MIE 620 - Linear Programming - Lecture 18 "Dual Simplex Algorithm".

Teaching

• Aug. 1997–present: Department of Statistics, Universidade Federal de Minas Gerais, Brazil. Courses: Scientific & Statistical Computing (graduate), Statistical Computing (graduate), Probability (undergraduate), Statistics & Probability for Engineers (undergraduate), Simulation (undergraduate).
• Mar. 1997–Jul. 1997: Department of Electrical Engineering, Pontifícia Universidade Católica de Minas Gerais, Brazil. Courses: network optimization (graduate).
• Mar. 1993–Dec. 1993: Department of Computer Science, Universidade Federal de Minas Gerais, Brazil. Courses: numerical calculus (undergraduate), operations research (undergraduate).
• Dec. 1991–Feb. 1993: Department of Mathematics, Statistics, and Computer Sciences, Universidade Federal de São João del Rei, Brazil. Courses: numerical calculus (undergraduate), computer programming (undergraduate).