Image of Prof. Torkar

Professor Richard Torkar   Google Scholar GitHub Twitter LinkedIn

See that the imagination of nature is far, far greater than the imagination of man.

Richard P. Feynman

Below you will find manuscripts (newest first) published in journals, proceedings, and book chapters, respectively.The latest papers may not yet be formally published.

Journal and Magazine Publications

  1. C. A. Furia, R. Feldt, and R. Torkar. Bayesian data analysis in empirical software engineering research. Transactions on Software Engineering, accepted for publication, 10.1109/TSE.2019.2935974
  2. E. Mellblom, I. Arason, L. Gren, and R. Torkar. The connection between burnout and personality types in software developers. IEEE Software, 36(5):57–64, 2019, 10.1109/MS.2019.2924769
  3. F. G. de Oliveira Neto, R. Torkar, R. Feldt, L. Gren, C. A. Furia, and Z. Huang. Evolution of statistical analysis in empirical software engineering research: Current state and steps forward. Journal of Systems and Software, 156():246–267, 2019, 10.1016/j.jss.2019.07.002
  4. B. Marculescu, R. Feldt, R. Torkar, and S. Poulding. Transferring interactive search-based software testing to industry. Journal of Systems and Software, 142():156–170, 2018, 10.1016/j.jss.2018.04.061
  5. L. Gren, R. Torkar, and R. Feldt. Group development and group maturity when building agile teams: A qualitative and quantitative investigation at eight large companies. Journal of Systems and Software, 124():104–119, 2017, 10.1016/j.jss.2016.11.024
  6. F. G. de Oliveira Neto, R. Torkar, and P. D. L. Machado. Full modification coverage through automatic similarity-based test case selection. Information and Software Technology, 80():124–137, 2016, 10.1016/j.infsof.2016.08.008
  7. B. Marculescu, S. Poulding, R. Feldt, K. Petersen, and R. Torkar. Tester interactivity makes a difference in search-based software engineering: A controlled experiment. Information and Software Technology, 78():66–82, 2016, 10.1016/j.infsof.2016.05.009
  8. W. Afzal, S. Alone, K. Glocksien, and R. Torkar. Software test process improvement approaches: A systematic literature review and an industrial case study. Journal of Systems and Software, 111():1–33, 2016, 10.1016/j.jss.2015.08.048
  9. L. Gren, R. Torkar, and R. Feldt. The prospects of a quantitative measurement of agility: A validation study on an agile maturity model. Journal of Systems and Software, 107():38–49, 2015, 10.1016/j.jss.2015.05.008
  10. B. Marculescu, R. Feldt, R. Torkar, and S. Poulding. An initial industrial evaluation of interactive search-based testing for embedded software. Applied Soft Computing, 29():26–39, 2015, 10.1016/j.asoc.2014.12.025
  11. N. E. Holt, L. Briand, and R. Torkar. Empirical evaluations on the cost-effectiveness of state-based testing: An industrial case study. Information and Software Technology, 56(8):890–910, 2014, 10.1016/j.infsof.2014.02.011
  12. W. Afzal, A. N. Ghazi, J. Itkonen, R. Torkar, A. Andrews, and K. Bhatti. An experiment on the effectiveness and efficiency of exploratory testing. Empirical Software Engineering, 20(3):844–878, 2015, 10.1007/s10664-014-9301-4
  13. W. Afzal, R. Torkar, R. Feldt, and T. Gorschek. Prediction of faults-slip-through in large software projects: An empirical evaluation. Software Quality Journal, 22(1):51–86, 2014, 10.1007/s11219-013-9205-3
  14. L. Madeyski, W. Orzeszyna, R. Torkar, and M. Józala. Overcoming the equivalent mutant problem: A systematic literature review and a comparative experiment of second order mutation. Transactions on Software Engineering, 40(1):23–42, 2013, 10.1109/TSE.2013.44
  15. E. Rogstad, L. Briand, and R. Torkar. Test case selection for black-box regression testing of database applications. Information and Software Technology, 55(10):1781–1795, 2013, 10.1016/j.infsof.2013.04.004
  16. D. Radjenović, M. Heričko, R. Torkar, and A. Živkovič. Software fault prediction metrics: A systematic literature review. Information and Software Technology, 55(8):1397–1418, 2013, 10.1016/j.infsof.2013.02.009
  17. H. Edison, N. bin Ali, and R. Torkar. Towards innovation measurement in the software industry. Journal of Systems and Software, 86(5):1390–1407, 2013, 10.1016/j.jss.2013.01.013
  18. S. Nidhra, M. Yanamadala, W. Afzal, and R. Torkar. Knowledge transfer challenges and mitigation strategies in global software development—A systematic literature review and industrial validation. International Journal of Information Management, 33(2):333–355, 2012, 10.1016/j.ijinfomgt.2012.11.004
  19. K. Riņķevičs and R. Torkar. Equality in cumulative voting: A systematic review with an improvement proposal. Information and Software Technology, 55(2):267–287, 2012, 10.1016/j.infsof.2012.08.004
  20. S. Schneider, R. Torkar, and T. Gorschek. Solutions in global software engineering: A systematic literature review. International Journal of Information Management, 33(1):119–132, 2012, 10.1016/j.ijinfomgt.2012.06.002
  21. W. Afzal, R. Torkar, and R. Feldt. Resampling methods in software quality classification. International Journal of Software Engineering and Knowledge Engineering (Special Issue on Emerging synergies of AI and SE), 22(2):203–223, 2012, 10.1142/S0218194012400037
  22. R. Torkar, T. Gorschek, R. Feldt, M. Svahnberg, U. A. Raja, and K. Kamran. Requirements traceability: A systematic review and industry case study. International Journal of Software Engineering and Knowledge Engineering, 22(3):1–49, 2012, 10.1142/S0218194012005846
  23. R. Berntsson Svensson, T. Gorschek, B. Regnell, R. Torkar, A. Shahrokni, and R. Feldt. Quality requirements in industrial practice: An extended interview study at eleven companies. Transactions on Software Engineering, 38(4):923–935, 2012, 10.1109/TSE.2011.47
  24. W. Afzal and R. Torkar. On the application of genetic programming for software engineering predictive modeling: A systematic review. Expert Systems with Applications, 38(9):11984–11997, 2011, 10.1016/j.eswa.2011.03.041
  25. T. Gorschek, A. Gomes, A. Pettersson, and R. Torkar. Introduction of a process maturity model for market-driven product management and requirements engineering. Journal of Software Maintenance and Evolution: Research and Practice, 24(1):83–113, 2011, 10.1002/smr.535
  26. R. Torkar, P. Minoves, and J. Garrigós. Adopting free/libre/open source software practices, techniques and methods for industrial use. Journal of the Association for Information Systems, 12(1), 2011, http://aisel.aisnet.org/jais/vol12/iss1/1/
  27. R. Feldt, L. Angelis, R. Torkar, and M. Samuelsson. Links between the personalities, views and attitudes of software engineers. Information and Software Technology, 52(6):611–624, 2010, 10.1016/j.infsof.2010.01.001
  28. M. Svahnberg, T. Gorschek, R. Feldt, R. Torkar, S. B. Saleem, and M. U. Shafique. A systematic review on strategic release planning models. Information and Software Technology, 52(3):237–248, 2010, 10.1016/j.infsof.2009.11.006
  29. W. Afzal, R. Torkar, and R. Feldt. A systematic review of search-based testing for non-functional system properties. Information and Software Technology, 51(6):957–976, 2009, 10.1016/j.infsof.2008.12.005
  30. M. Hildingson and R. Torkar. Bringing the monkey to the iPAQ. .NET Developer’s Journal, (Aug. 2003). SYS-CON Media, Inc.

Conference and Workshop Proceedings

  1. J. Sundell, R. Torkar, K. Lundqvist, and H. Forsberg. “Prediction of undetected faults in safety-critical software,” In 2019 IEEE International Conference on Software Testing, Verification and Validation Workshops (ICSTW), April 22–23, 2019. 10.1109/ICSTW.2019.00069
  2. F. Dobslaw, R. Feldt, D. Michaelsson, P. Haar, F. G. de Oliveira Neto, and R. Torkar. “Estimating return on investment for GUI test automation tools,” In Proceedings of the 30th International Symposium on Software Reliability Engineering (ISSRE’19), Oct. 28–31, 2019.
  3. R. Berntsson Svensson, R. Feldt, and R. Torkar. “The unfulfilled potential of data-driven decision making in agile software development,” In Agile Processes in Software Engineering and Extreme Programming (XP 2019). Lecture Notes in Business Information Processing, vol. 355. May 21–25, 2019. 10.1007/978-3-030-19034-7_5
  4. R. Feldt, F. G. de Oliveira Neto and R. Torkar. “Ways of applying artificial intelligence in software engineering,” In Proceedings of the 6th International Workshop on Realizing Artificial Intelligence Synergies in Software Engineering (RAISE’18), May 27, 2018. 10.1145/3194104.3194109
  5. M. Felderer, B. Marculescu, F. G. de Oliveira Neto, R. Feldt and R. Torkar. “A testability analysis framework for non-functional properties,” In Proceedings of the 11th International Conference on Software Testing, Verification and Validation (ICST’18)—2nd International Workshop on Testing Extra-Functional Properties and Quality Characteristics of Software Systems, April 9, 2018. 10.1109/ICSTW.2018.00028
  6. L. Nakyanzi Gwosuta, R. Darwish and R. Torkar. “A short report from an experiment on improving functional test coverage maximization in the automotive industry,” In Proceedings of the 10th International Conference on Software Testing, Verification and Validation (ICST’17)—Industry track, March 13–17, 2017.
  7. M. Irshad, R. Torkar, K. Petersen and W. Afzal. “Capturing cost avoidance through reuse: Systematic review and industrial evaluation,” In Proceedings of the 20th International Conference on Evaluation and Assessment in Software Engineering (EASE’16), June 1–3, 2016. 10.1145/2915970.2915989
  8. B. Marculescu, R. Feldt and R. Torkar. “Using exploration focused techniques to augment search-based software testing: An experimental evaluation,” In Proceedings of the 9th International Conference on Software Testing, Verification and Validation (ICST’16), April 10–15, 2016. 10.1109/ICST.2016.26
  9. L. Gren, R. Torkar and R. Feldt. “Group maturity and agility, are they connected?—A survey study,” In Proceedings of the 41st Euromicro Conference on Software Engineering and Advanced Applications (SEAA’15), Aug. 26–28, 2015. 10.1109/SEAA.2015.3
  10. F. G. de Oliveira Neto, R. Torkar and P. D. L. Machado. “An initiative to improve reproducibility and empirical evaluation of software testing techniques,” In Proceedings of the 37th International Conference on Software Engineering (ICSE’15)—New Ideas and Emerging Results, May 20–22, 2015. 10.1109/ICSE.2015.197
  11. E. Lindqvist, H. Larsson and R. Torkar. “Outliers and replication in software engineering,” In Proceedings of the 21st Asia-Pacific Software Engineering Conference (APSEC’14), Dec. 1–4, 2014. 10.1109/APSEC.2014.40
  12. N. A. Ghazi, J. Andersson, R. Torkar, K. Petersen, J Börstler. “Information sources and their importance to prioritize test cases in heterogeneous systems context,” In Proceedings of the 21st European Conference on Systems, Software and Services Process Improvement (EuroSPI’14), June 25–27, 2014. 10.1007/978-3-662-43896-1_8
  13. L. Gren, R. Torkar and R. Feldt. “Work motivational challenges regarding the interface between agile teams and a non-agile surrounding organization: A case study,” In Proceedings of Agile 2014, July 28–August 1, 2014. 10.1109/AGILE.2014.13
  14. B. Marculescu, R. Feldt and R. Torkar. “Objective re-weighting to guide an interactive search based software testing system,” In Proceedings of the 12th International Conference on Machine Learning and Applications (ICMLA’13), Dec. 4–7, 2013. 10.1109/ICMLA.2013.113
  15. B. Marculescu, R. Feldt and R. Torkar. “Practitioner-oriented visualization in an interactive search-based software test creation tool,” In Proceedings of the 20th Asia-Pacific Software Engineering Conference (APSEC’13), Dec. 2–5, 2013. 10.1109/APSEC.2013.120
  16. F. G. de Oliveira Neto, R. Feldt, R. Torkar and P. D. L. Machado. “Searching for models to evaluate software technology,” In Proceedings of the 1st International Workshop on Combining Modelling and Search-Based Software Engineering, co-located with the 35th International Conference on Software Engineering (ICSE’13), May 18–26, 2013. 10.1109/CMSBSE.2013.6604430
  17. N. E. Holt, R. Torkar, L. Briand and K. Hansen. “State-based testing: Industrial evaluation of the cost effectiveness of round-trip path and sneak-path testing strategies,” In Proceedings of the 23rd International Symposium on Software Reliability Engineering (ISSRE’12), Nov. 27–30, 2012. 10.1109/ISSRE.2012.17
  18. B. Marculescu, R. Feldt and R. Torkar. “A concept for an interactive search-based software testing system,” In Proceedings of the 4th International Symposium on Search-Based Software Engineering (SSBSE’12), Sept. 28–30, 2012. 10.1007/978-3-642-33119-0_21
  19. E. Engström, R. Feldt and R. Torkar. “Indirect effects in evidential assessment: A case study on regression test technology adoption,” In Proceedings of the 2nd International Workshop on Evidential Assessment of Software Technologies (EAST’12), 22 Sept. 2012. 10.1145/2372233.2372239
  20. J. Pelto-Piri, P. Molin and R. Torkar. “A unified model for server usage and operational costs based on user profiles: An industrial evaluation,” In Proceedings of the 24th International Conference on Software Engineering and Knowledge Engineering (SEKE’12), July 1–3, 2012.
  21. B. Marculescu, R. Feldt, R. Torkar, L.-G. Green, T. Liljegren and E. Hult. “Flexible and low-cost measurements for space software development—The measurements exploration framework," In Proceedings of the 2011 Data Systems in Space (DASIA’11), May 17–20, 2011.
  22. R. Berntsson Svensson, T. Gorschek, B. Regnell, R. Torkar, A. Shahrokni, R. Feldt and A. Aurum “Prioritization of quality requirements: State of practice in eleven companies,” In Proceedings of the 19th International Requirements Engineering Conference (RE’11), Aug. 29–Sept. 2, 2011. 10.1109/RE.2011.6051652
  23. S. Mairhofer, R. Feldt, and R. Torkar. “Search-based software testing and test data generation for a dynamic programming language,” In Proceedings of the 13th annual conference on Genetic and evolutionary computation (GECCO’11), July 12–16, 2011. 10.1145/2001576.2001826
  24. R. Torkar, N. M. Awan, A. K. Alvi and W. Afzal. “Predicting software test effort in iterative development using a dynamic Bayesian network,” In Proceedings of the 21st IEEE International Symposium on Software Reliability Engineering (ISSRE’10), (Industry Practice Track), Nov. 1–4, 2010.
  25. W. Afzal, R. Torkar, R. Feldt and G. Wikstrand. “Search-based prediction of fault-slip-through in large software projects,” In Proceedings of the 2nd International Symposium on Search Based Software Engineering (SBSE’10), Sept. 7–9, 2010. 10.1109/SSBSE.2010.19
  26. R. Feldt, J. Schulte, P. Preissing, B. Marculescu, R. Torkar and E. Hult. “Optimizing verification and validation activities for software in the space industry," In Proceedings of the 2010 Data Systems in Space (DASIA’10), July 1–4, 2010.
  27. R. Feldt, R. Torkar, E. Ahmad and B. Raza. “Challenges with software verification and validation activities in the space industry," In Proceedings of the 3rd International Conference on Software Testing, Verification and Validation (ICST’10), April 6–10, 2010. 10.1109/ICST.2010.37
  28. W. Afzal, R. Torkar, and R. Feldt. “Search-based prediction of fault count data," In Proceedings of the 1st International Symposium on Search Based Software Engineering (SBSE’09), May 13–15, 2009. 10.1109/SSBSE.2009.17
  29. R. Torkar, T. Gorschek and R. Feldt. “Eight conference on software engineering research and practice in Sweden (SERPS’08),” SIGSOFT Softw. Eng. Notes 34(2), pp. 31–33, 2009. 10.1145/1517459.1517461
  30. R. Feldt, C. Wohlin, C. Gencel, T. Gorschek, L. Kuzniarz, D. Smite, M. Svahnberg and R. Torkar, “Quality Evaluation for the Licentiate—A Swedish Intermediate Research Degree”, Swedish National Agency for Higher Education’s Conference on Quality, May 13–14, 2009.
  31. W. Afzal, R. Torkar and R. Feldt. “Prediction of fault count data using genetic programming,” In Proceedings of the 2008 Multi-topic Conference (INMIC’08), Dec. 23–24, 2008. 10.1109/INMIC.2008.4777762
  32. W. Afzal and R. Torkar. “Lessons from applying experimentation in software engineering prediction systems,” In Proceedings of the 2nd International Workshop on Software Productivity Analysis and Cost Estimation (SPACE’08), co-located with 15th Asia-Pacific Software Engineering Conference (APSEC’08), Dec. 3–5, 2008.
  33. M. Bäumer, P. Seidler, R. Torkar, P. Tomaszewski, L.-O. Damm and R. Feldt. “Predicting fault inflow in highly iterative software development processes: An industrial evaluation,” In Proceedings of the 19th International Symposium on Software Reliability Engineering (ISSRE’08), Nov. 11-14, 2008.
  34. W. Afzal and R. Torkar. “Suitability of genetic programming for software reliability growth modeling,” In Proceedings of the international Symposium on Computer Science and Its Applications (CSA’08), Oct. 13-15, 2008. 10.1109/CSA.2008.13
  35. W. Afzal and R. Torkar. “A comparative evaluation of using genetic programming for predicting fault count data,” In Proceedings of the 2008 the Third international Conference on Software Engineering Advances (SEA’08), Oct. 26–31, 2008. 10.1109/ICSEA.2008.9
  36. D. Šmite, N. B. Moe and R. Torkar. “Pitfalls in remote team coordination: Lessons learned from a case study,” In Proceedings of the 9th International Conference on Product-Focused Software Process Improvement (PROFES’08), A. Jedlitschka and O. Salo, Eds. Lecture Notes In Computer Science, vol. 5089, pp. 345–359. Springer-Verlag, Berlin, Heidelberg. 10.1007/978-3-540-69566-0_28
  37. W. Afzal, R. Torkar and R. Feldt. “A systematic mapping study on non-functional search-based software testing,” In Proceedings of the 20th International Conference on Software Engineering and Knowledge Engineering (SEKE’08), July 1–3, 2008.
  38. R. Torkar, R. Feldt and T. Gorschek. “Extracting generally applicable patterns from object-oriented programs for the purpose of test case creation,” In B. Russo, E. Damiani, S. A. Hissam, B. Lundell and G. Succi, Eds. Open Source Development, Communities and Quality, volume 275 of IFIP, pp. 281–287, Sept. 7-10, 2008. Springer. 10.1007/978-0-387-09684-1_24
  39. R. Feldt, R. Torkar, T. Gorschek and W. Afzal. “Searching for cognitively diverse tests: Towards universal test diversity metrics,” In Software Testing Verification and Validation Workshop (ICSTW’08), co-located with 1st International Conference on Software Testing, Verification and Validation (ICST’08). April 9-11, 2008. 10.1109/ICSTW.2008.36
  40. W. Afzal and R. Torkar. “Incorporating metrics in an organizational test strategy," In Software Testing Verification and Validation Workshop (ICSTW’08), co-located with 1st International Conference on Software Testing, Verification and Validation (ICST’08). April 9-11, 2008. 10.1109/ICSTW.2008.23
  41. R. Feldt, R. Torkar, L. Angelis and M. Samuelsson. “Towards individualized software engineering: Empirical studies should collect psychometrics,” In Proceedings of the 2008 international Workshop on Cooperative and Human Aspects of Software Engineering (CHASE’08), May 13, 2008. 10.1145/1370114.1370127
  42. T. Gorschek, S. Fricker, R. Feldt, R. Torkar, C. Wohlin and M. Mattsson. “1st International Global Requirements Engineering Workshop—GREW’07,” SIGSOFT Softw. Eng. Notes 33(2), pp. 29–32, March 2008. 10.1145/1350802.1350807
  43. R. Torkar and S. Mankefors. “A survey on testing and reuse,” In Proceedings of the IEEE International Conference on Software-Science, Technology & Engineering (SwSTE’03), Nov. 4–5, 2003. 10.1109/SWSTE.2003.1245437
  44. R. Torkar, S. Mankefors, K. Hansson and A. Jonsson. “An exploratory study of component reliability using unit testing,” In Proceedings of the 14th international Symposium on Software Reliability Engineering (ISSRE’03), Nov. 17-21, 2003. 10.1109/ISSRE.2003.1251045
  45. S. Mankefors, R. Torkar and A. Boklund. “New quality estimations in random testing,” In Proceedings of the 14th international Symposium on Software Reliability Engineering (ISSRE’03), Nov. 17-21, 2003. 10.1109/ISSRE.2003.1251067

Book Chapters

  1. R. Torkar, R. Feldt and C. A. Furia (2020) “Bayesian data analysis in empirical software engineering—The case of missing data,” in Contemporary Empirical Methods in Software Engineering, M. Felderer and G. Horta Travos (eds), Ch. 11. Springer.
  2. W. Afzal and R. Torkar (2016) “Towards benchmarking feature subset selection methods for software fault prediction,” in Computational Intelligence and Quantitative Software Engineering, W. Pedrycz, G. Succi, and A. Sillitti (eds), pp. 33–58. Springer. 10.1007/978-3-319
  3. W. Afzal, R. Torkar, R. Feldt, and T. Gorschek (2009) “Genetic programming for cross-release fault count predictions in large and complex software projects,” in Evolutionary Computation and Optimization Algorithms in Software Engineering, M. Chis (ed), pp. 94–126, Hershey:IGI Global. 10.4018/978-1-61520-809-8.ch00