Waldemar W. Koczkodaj, Professor

Address Computer Science
Laurentian University
935 Ramsey Lk Rd
Sudbury, Ontario P3E 2C6
Contacts wkoczkodaj [at] cs laurentian ca (most preferable contact; always acknowledged)
fax 705/673-6591, tel. 705/675-1151 x.2311
or locate me by google Canada Koczkodaj
Research areas                     
  • knowledge-based systems (based on consistency-driven pairwise comparisons, CDPC introduced in 1993, a theory for processing subjectivity),
  • decision and expert systems,
  • medical assessments,
  • medical informatics, medical decision support systems,
  • the human aspects of IT,
  • human-computer interaction,
  • data mining and data engineering,
  • systems analysis and software engineering,
  • projects involving multi-criteria evaluation pairwise comparisons.
Hits Site
19 Library and Archives Canada
5 The Library of Congress
7 University of Toronto Libraries
7 British Library
2 National Library of Australia
5 Barnes & Noble

The Mathematics Genealogy Project sequence includes the following advisors: Wiktor Marek (1968), Andrzej Mostowski (1938), Alfred Tarski (1924), Kazimierz Kuratowski (1938), Wacław Sierpiński (1913), Stanislaw Lesniewski (1912), Émile Borel (1902), Andrei Markov (1897), Pafnuty Chebyshev (1884), Simeon Poisson (1814), Leonhard Euler (?) , Joseph Lagrange(?), Johann Bernoulli (1726), Gottfried Leibniz (1684), Erhard  Weigel (1650).

It is only a partial sequence where (*) shows the year of Ph.D.

Erdos number: 3

A recent recognition of the method by a publication in the Journal of Global Optimization by Springer Netherlands: 
On Saaty ’s and Koczkodaj ’s inconsistencies of pairwise comparison matrices

Service to academic community and other professional activities (most of them)

Industrial Appointments

PUBLICATIONS (some of them)

More recent (eagerly distributed for advancing your personal research)

Tamar Kakiashvili, Waldemar W. Koczkodaj, Marc Woodbury-Smith: Improving the medical scale predictability by the pairwise comparisons method: Evidence from a clinical data study. Computer Methods and Programs in Biomedicine 105(3): 210-216, 2012.

Mohammed Alqarni, Yassen Arabi, Tamar Kakiashvili, Mohammed Khedr, Waldemar W. Koczkodaj, J. Leszek, Artur Przelaskowski, K. Rutkowski: Improving the predictiveness of ICU medical scales by the method of pairwise comparisons. FedCSIS 2011: 11-17, 2011.

Sándor Bozóki, Jándor Fülöp, Waldemar W. Koczkodaj: An LP-based inconsistency monitoring of pairwise comparison matrices. Mathematical and Computer Modelling 54(1-2): 789-793, 2011.

Bozoki, S; Fulop, J; Koczkodaj, WW, An LP-based inconsistency monitoring of pairwise comparison matrices, MATHEMATICAL AND COMPUTER MODELLING   Volume: 54   Issue: 1-2   Pages: 789-793, 2011

Waldemar W. Koczkodaj, Vova Babiy, Agnieszka D. Bogobowicz, Ryszard Janicki, Alan Wassyng: Selecting the best strategy in a software certification process. IMCSIT 2010: 53-58, 2010.

                       Koczkodaj, W.W., Przelaskowski, A, Szopinski, KT, Medical Knowledge Mining from Image Data -- Synthesis of Medical Image Assessments for Early Stroke Detection, Machine Graphics & Vision, vol. 19, no. 2, pp. 283-298, 2010.

J. Fülöp, Waldemar W. Koczkodaj, S. J. Szarek: A Different Perspective on a Scale for Pairwise Comparisons. T. Computational Collective Intelligence 1: 71-84 (2010)

Koczkodaj W. W.; Szarek S. J., On distance-based inconsistency reduction algorithms for pairwise comparisons
LOGIC JOURNAL OF THE IGPL  Volume: 18   Issue: 6   Pages: 859-869   DOI: 10.1093/jigpal/jzp062, 2010

Koczkodaj WW., No sex difference in area estimation. Percept Mot Skills. 2009 Aug;109(1):168.

Adamic P, Babiy V, Janicki R, Kakiashvili T, Koczkodaj WW, Tadeusiewicz R., Pairwise comparisons and visual perceptions of equal area polygons. Percept Mot Skills. 2009 Feb;108(1):37-42.

Volodymyr Babiy, Ryszard Janicki, Tiffany Jingco, Tamar Kakiashvili, Waldemar W. Koczkodaj, Marc Woodbury-Smith: Benefits of Using Tabular Expressions in Planning Health Services. Software Engineering Research and Practice 2009: 99-102, 2009.

Tamar Kakiashvili, Waldemar W. Koczkodaj, Phyllis Montgomery, Kalpdrum Passi, Ryszard Tadeusiewicz: Assessing the properties of the World Health Organization's Quality of Life Index. IMCSIT 2008: 151-154, 2008.

Ratvinder Singh Grewal, Ryszard Janicki, Tamar Kakiashvili, K. Kielan, Waldemar W. Koczkodaj, Kalpdrum Passi, Ryszard Tadeusiewicz: Attacking the Web Cancer with the Automatic Understanding Approach. AWIC 2007: 136-141

Most quoted contributions:

Koczkodaj, W.W., A new definition of consistency of pairwise comparisons, Mathematical and computer modeling 18(7), p.79-84, Elsevier Science, 1993.

Duszak, Z., Koczkodaj, W.W., Generalization of a new definition of consistency for pairwise comparisons. Information Processing Letters, 52(5), p.273-276, 1994.

Koczkodaj, W.W., Orlowski, M., Marek, V.W., Myths about Rough Set Theory, Communication of the ACM, 41(11), 1998.

Koczkodaj, W.W., Testing the Accuracy Enhancement of Pairwise Comparisons by a Monte Carlo Experiment, Journal of Statistical Planning and Inference, 69(1), pp. 21-32, 1998.

Herman, M.W., Koczkodaj, W.W.,A Monte Carlo study of pairwise comparison, Information Processing Letters, 57(1), pp. 25-29,1996.

Koczkodaj, W.W., Herman, M.W., Orlowski, Using Consistency-driven Pairwise Comparisons in Knowledge-based Systems, Proceedings of the Sixth international conference on Information and knowledge management,Las Vegas, Nevada, United States, p.91-96, 1997.

Koczkodaj, W.W., Herman, M.W., Orlowski,Managing Null Entries in Pairwise Comparisons, Knowledge and Information Systems, 1(1), pp. 119-125,  1999.

Koczkodaj, W.W., Herman, M.W., APL2 implementation of a new definition of consistency of pairwise comparisons, ACM SIGAPL APL Quote Quad, 24(4) pp. 37-40, 1994.

Janicki, R., Koczkodaj, W.W., A Weak Order Solution to a Group Ranking and Consistency-driven Pairwise Comparisons, Applied Mathematics with Computation, 94(2/3), p.227-236, 1998.

Janicki, R., Koczkodaj, W.W., A Weak Order Approach to Group Ranking, Computers and Mathematics with Applications, 32(2), pp. 51-59, 1996.

Koczkodaj, W.W., Orlowski, M., Wallenius, L., Wilson, R.M., A Note on Using Consistency-Driven Approach to CD-ROM Selection, Library Software Review, 16(1), pp. 4- 11, 1997.

Koczkodaj, W.W., Mackasey, W.O., Mineral Potential Assessment by the Consistency-driven Pairwise Comparisons Method, EMG, 6(1), pp. 23-33 1997.

Koczkodaj, W.W., Statistically Accurate Evidence of Improved Error Rate by Pairwise Comparisons, Perceptual and Motor Skills, 82, p.43-48, 1996.

Travel experience (in the alphabetical order, 31 countries on three continents)
Europe: Austria, Belorussia, Bosnia-Herzegovina, Bulgaria, Croatia, Czech Republic, Finland, Georgia, Germany, Great Britain, Greece, Holland, Hungary, Italy, Norway, Poland, Russia, Serbia, Slovak Republic, Slovenia, Sweden, Switzerland, Ukraine;

Canada (eight provinces), USA (most states);

Armenia, Georgia, Iraq, Japan, Kuwait, Turkey.