• Fairness of seat allocation methods in proportional representation 

      Van Eck, L.; Visagie, Stephan E.; De Kock, H. C. (Operations Research Society of South Africa, 2005)
      ENGLISH SUMMARY : In this paper the fairness of some methods of allocating seats in a proportional representation (PR) voting system is investigated. Different PR systems are in use throughout the democratic world, but ...
    • Selection and scheduling of jobs with time-dependent duration 

      Seegmuller, D. M.; Visagie, Stephan E.; De Kock, H. C.; Pienaar, W. J. (Operations Research Society of South Africa, 2007)
      ENGLISH SUMMARY : In this paper two mathematical programming models, both with multiple objective functions, are proposed to solve four related categories of job scheduling problems. All four of these categories have the ...