David M. Ryan

2.7k total citations
43 papers, 1.8k citations indexed

About

David M. Ryan is a scholar working on Industrial and Manufacturing Engineering, Management Science and Operations Research and Control and Systems Engineering. According to data from OpenAlex, David M. Ryan has authored 43 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Industrial and Manufacturing Engineering, 19 papers in Management Science and Operations Research and 8 papers in Control and Systems Engineering. Recurrent topics in David M. Ryan's work include Vehicle Routing Optimization Methods (20 papers), Scheduling and Timetabling Solutions (13 papers) and Transportation Planning and Optimization (8 papers). David M. Ryan is often cited by papers focused on Vehicle Routing Optimization Methods (20 papers), Scheduling and Timetabling Solutions (13 papers) and Transportation Planning and Optimization (8 papers). David M. Ryan collaborates with scholars based in New Zealand, United States and Denmark. David M. Ryan's co-authors include Matthias Ehrgott, Jesper Larsen, Richard Martin Lusby, Steven E. Butt, Cameron Walker, Paul Rouse, Martin Putterill, M. R. Osborne, Golbon Zakeri and Andrew Mason and has published in prestigious journals such as Biometrics, European Journal of Operational Research and Operations Research.

In The Last Decade

David M. Ryan

42 papers receiving 1.6k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
David M. Ryan New Zealand 24 1.3k 484 399 299 216 43 1.8k
Michele Monaci Italy 29 2.1k 1.7× 396 0.8× 217 0.5× 144 0.5× 138 0.6× 84 3.0k
Pamela H. Vance United States 10 1.9k 1.5× 381 0.8× 284 0.7× 368 1.2× 50 0.2× 12 2.5k
Ralf Borndörfer Germany 18 785 0.6× 87 0.2× 645 1.6× 260 0.9× 209 1.0× 101 1.3k
Arjang A. Assad United States 22 2.0k 1.6× 186 0.4× 491 1.2× 831 2.8× 106 0.5× 59 2.6k
Inneke Van Nieuwenhuyse Belgium 21 952 0.7× 455 0.9× 125 0.3× 362 1.2× 61 0.3× 72 2.1k
Massimiliano Caramia Italy 19 540 0.4× 373 0.8× 196 0.5× 186 0.6× 35 0.2× 90 1.2k
José A. Ventura United States 27 1.1k 0.9× 270 0.6× 95 0.2× 141 0.5× 92 0.4× 138 2.2k
Roberto Roberti Italy 21 1.7k 1.3× 144 0.3× 356 0.9× 842 2.8× 132 0.6× 39 2.0k
Anita Schöbel Germany 31 1.3k 1.0× 601 1.2× 1.3k 3.3× 538 1.8× 386 1.8× 134 3.0k

Countries citing papers authored by David M. Ryan

Since Specialization
Citations

This map shows the geographic impact of David M. Ryan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by David M. Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites David M. Ryan more than expected).

Fields of papers citing papers by David M. Ryan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by David M. Ryan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by David M. Ryan. The network helps show where David M. Ryan may publish in the future.

Co-authorship network of co-authors of David M. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of David M. Ryan. A scholar is included among the top collaborators of David M. Ryan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with David M. Ryan. David M. Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Walker, Cameron, et al.. (2016). Integer programming for minimal perturbation problems in university course timetabling. Annals of Operations Research. 252(2). 283–304. 32 indexed citations
2.
Lusby, Richard Martin, et al.. (2015). A new approach to the Container Positioning Problem. Flexible Services and Manufacturing Journal. 28(4). 617–643. 4 indexed citations
3.
Waterer, Hamish, et al.. (2014). Integer programming methods for large-scale practical classroom assignment problems. Computers & Operations Research. 53. 42–53. 40 indexed citations
4.
Ryan, David M., et al.. (2014). Multi‐objective Approaches to the Unit Crewing Problem in Airline Crew Scheduling. Journal of Multi-Criteria Decision Analysis. 21(5-6). 257–277. 4 indexed citations
5.
Ryan, David M., et al.. (2009). An iterative approach to robust and integrated aircraft routing and crew scheduling. Computers & Operations Research. 37(5). 833–844. 107 indexed citations
6.
Ryan, David M., et al.. (2009). The train driver recovery problem—A set partitioning based model and solution method. Computers & Operations Research. 37(5). 845–856. 50 indexed citations
7.
Lusby, Richard Martin, Jesper Larsen, Matthias Ehrgott, & David M. Ryan. (2009). Railway track allocation: models and methods. OR Spectrum. 33(4). 843–883. 246 indexed citations
8.
Rouse, Paul, Martin Putterill, & David M. Ryan. (2002). Integrated Performance Measurement Design: Insights from an Application in Aircraft Maintenance. SSRN Electronic Journal. 2 indexed citations
9.
Ehrgott, Matthias & David M. Ryan. (2002). Constructing robust crew schedules with bicriteria optimization. Journal of Multi-Criteria Decision Analysis. 11(3). 139–150. 129 indexed citations
10.
Miller, Stephen, et al.. (2001). Optimized Crew Scheduling at Air New Zealand. INFORMS Journal on Applied Analytics. 31(1). 30–56. 37 indexed citations
11.
Ryan, David M.. (2000). Mathematics in Action: Two New Zealand Case Studies.. 1 indexed citations
12.
Butt, Steven E. & David M. Ryan. (1999). An optimal solution procedure for the multiple tour maximum collection problem using column generation. Computers & Operations Research. 26(4). 427–441. 96 indexed citations
13.
Mason, Andrew, et al.. (1998). Integrated Simulation, Heuristic and Optimisation Approaches to Staff Scheduling. Operations Research. 46(2). 161–175. 69 indexed citations
14.
Holt, J. N., et al.. (1997). Aircrew schedule generation using repeated matching. European Journal of Operational Research. 102(1). 21–35. 11 indexed citations
15.
Ryan, David M., et al.. (1993). Extensions of the Petal Method for Vehicle Routeing. Journal of the Operational Research Society. 44(3). 289–289. 4 indexed citations
16.
Ryan, David M.. (1992). The Solution of Massive Generalized Set Partitioning Problems in Aircrew Rostering. Journal of the Operational Research Society. 43(5). 459–467. 99 indexed citations
17.
Ryan, David M., et al.. (1980). Estimating Ventilation/Perfusion Distributions from Inert Gas Data: A Bayesian Approach. Biometrics. 36(1). 105–105. 5 indexed citations
18.
Osborne, M. R. & David M. Ryan. (1970). On penalty function methods for nonlinear programming problems. Journal of Mathematical Analysis and Applications. 31(3). 559–578. 11 indexed citations
19.
Roberts, Peter, et al.. (1970). Stochastic-network Reduction and Sensitivity Techniques in a Cost Effectiveness Study of a Military Communications System. Journal of the Operational Research Society. 21(sup1). 45–67. 3 indexed citations
20.
Kowalik, Janusz S., M. R. Osborne, & David M. Ryan. (1969). A New Method for Constrained Optimization Problems. Operations Research. 17(6). 973–983. 24 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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