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Dr David Worthington

Senior Lecturer

  1. 2020
  2. Published

    Infinite-server queueing models of demand in healthcare: A review of applications and ideas for further work

    Worthington, D., Utley, M. & Suen, D., 1/08/2020, In: Journal of the Operational Research Society. 71, 8, p. 1145-1160 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  3. Published

    A Spline-based Method for Modelling and Generating a Nonhomogeneous Poisson Process

    Morgan, L., Nelson, B., Titman, A. & Worthington, D., 20/02/2020, Proceedings of the 2019 Winter Simulation Conference. IEEE Press, 12 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  4. 2019
  5. Published

    Detecting bias due to input modelling in computer simulation

    Morgan, L., Nelson, B., Titman, A. & Worthington, D., 16/12/2019, In: European Journal of Operational Research. 279, 3, p. 869-881 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  6. E-pub ahead of print

    Symbiotic simulation for the operational management of inpatient beds: model development and validation using Δ-method

    Oakley, D., Onggo, B. S. & Worthington, D., 3/06/2019, In: Health Care Management Science. 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  7. Published

    Multi-fidelity simulation optimisation for airline disruption management

    Rhodes-Leader, L., Worthington, D. J., Nelson, B. L. & Onggo, B. S. S., 4/02/2019, 2018 Winter Simulation Conference (WSC). IEEE, p. 2179-2190 12 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  8. 2018
  9. Published

    Airline Disruption Recovery Using Symbiotic Simulation and Multi-fidelity Modelling

    Rhodes-Leader, L., Onggo, B. S. S., Worthington, D. J. & Nelson, B. L., 19/03/2018, Proceedings of the 9th Operational Research Society Simulation Workshop (SW18). Operational Research Society, p. 146-155 10 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  10. 2017
  11. Published

    Detecting bias due to input modelling in computer simulation

    Morgan, L., Nelson, B. L., Titman, A. C. & Worthington, D. J., 3/12/2017, 2017 Winter Simulation Conference (WSC). Piscataway, NJ, USA: IEEE Press, p. 1974-1985 12 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  12. Published

    Staffing of time-varying queues using a geometric discrete time modelling approach

    Chen, X. & Worthington, D. J., 05/2017, In: Annals of Operations Research. 252, 1, p. 63-84 22 p.

    Research output: Contribution to journalJournal articlepeer-review

  13. 2016
  14. Published

    Input uncertainty quantification for simulation models with piecewise-constant non-stationary Poisson arrival processes

    Morgan, L., Titman, A. C., Worthington, D. J. & Nelson, B. L., 11/12/2016, WSC '16 Proceedings of the 2016 Winter Simulation Conference . Piscataway, NJ, USA: IEEE Press, p. 370-381 12 p. (WSC '16 Proceedings of the Winter Simulation Conference).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  15. Published

    A modelling tool for capacity planning in acute and community stroke services

    Monks, T., Worthington, D. J., Allen, M., Pitt, M., Stein, K. & James, M. A., 29/09/2016, In: BMC Health Services Research. 16, 8 p., 530.

    Research output: Contribution to journalJournal articlepeer-review

  16. 2015
  17. Published

    Use of queue modelling in the analysis of elective patient treatment governed by a maximum waiting time guarantee

    Kozlowski, D. & Worthington, D., 1/07/2015, In: European Journal of Operational Research. 244, 1, p. 331-338 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  18. 2014
  19. Published

    Effects of state-dependent balking on multi-server non-stationary queueing systems

    Chassioti, E., Worthington, D. J. & Glazebrook, K. D., 03/2014, In: Journal of the Operational Research Society. 65, 2, p. 278-290 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  20. 2013
  21. Published

    Stakeholder saliency dynamics in strategic ICT projects

    Al-Ghaith, T., Brown, D. & Worthington, D., 1/12/2013, 19th Americas Conference on Information Systems, AMCIS 2013 - Hyperconnected World: Anything, Anywhere, Anytime. p. 3056-3065 10 p. (19th Americas Conference on Information Systems, AMCIS 2013 - Hyperconnected World: Anything, Anywhere, Anytime; vol. 4).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  22. Published

    Stakeholder dynamics in strategic ICT projects: appreciative systems perspective.

    Al-Ghaith, T., Brown, D. & Worthington, D., 10/09/2013. 6 p.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  23. Published

    Stakeholder dynamics in strategic ICT projects

    Al-Ghaith, T., Brown, D. & Worthington, D., 15/08/2013. 6 p.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  24. 2012
  25. Published

    Will delays in treatment jeopardize the population benefit from extending the time window for stroke thrombolysis?

    Pitt, M., Monks, T., Agarwal, P., Worthington, D., Ford, G., Lees, K., Stein, K. & James, M., 11/2012, In: Stroke. 43, 11, p. 2992-2997 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  26. Published

    Behavioural Modelling of Career Progression in the European Commission

    Onggo, S., Soopramanien, D., Pidd, M. & Worthington, D., 2012, In: European Journal of Operational Research. 222, 3, p. 632–641 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  27. Published

    Capacity Planning

    Worthington, D. & Utley, M., 2012, Handbook of Healthcare System Scheduling. Hall, R. W. . (ed.). New York: Springer, p. 11-30 20 p. (International Series in Operations Research & Management Science; no. 168).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter (peer-reviewed)

  28. Unpublished
  29. Published

    Setting Staffing Requirements for Time Dependent Queueing Networks: The Case of Accident and Emergency Departments

    Izady, N. & Worthington, D., 2012, In: European Journal of Operational Research. 219, 3, p. 531-540 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  30. Unpublished

    Stability and out-of-time validation of credit risk models

    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2012, (Unpublished).

    Research output: Working paper

  31. 2011
  32. Published

    Approximate analysis of non-stationary loss queues and networks of loss queues with general service time distributions

    Izady, N. & Worthington, D. J., 09/2011, In: European Journal of Operational Research. 213, 3, p. 498-508 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  33. Published
  34. 2010
  35. Published

    Stakeholders’ dynamics in ICT strategic projects in Saudi public hospitals: appreciative system concept – a ‘work in progress’ perspective

    Al-Ghaith, T., Brown, D. & Worthington, D., 14/07/2010. 8 p.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  36. Published

    Simulation of career development in the European Commission

    Onggo, B. S. S., Pidd, M., Soopramanien, D. G. R. & Worthington, D. J., 05/2010, In: Interfaces. 40, 3, p. 184-195 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  37. Published

    Operations research diffusion in healthcare management

    Langabeer, J. & Worthington, D. J., 2010, In: Journal of Health Care Finance. 36, 3, p. 73-87 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  38. 2009
  39. Published

    Reflections on queue modelling from the last 50 years

    Worthington, D. J., 05/2009, In: Journal of the Operational Research Society. 60, S1, p. S83-S92 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  40. Published

    Modelling Career Development Schemes in the European Commission

    Onggo, B. S. S., Pidd, M., Soopramanien, D. G. R. & Worthington, D. J., 2009, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  41. Published

    What is a 'generic' hospital model? - a comparison of 'generic' and 'specific' hospital models of emergency flow patients

    Fletcher, A. & Worthington, D. J., 2009, In: Health Care Management Science. 12, 4, p. 374-391 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  42. 2007
  43. Published

    Operational research modelling to support healthcare operations management

    Worthington, D. J., 2007, European Working Group - Operational Research Applied to Health Services - 2007. Peter Lang Publishing

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  44. Published

    Statistical modelling to predict corporate default for Brazilian companies in the context of Basel II using a new set of financial ratios

    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2007, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  45. Published

    The DH accident and emergency department model - a national generic model used locally

    Fletcher, A., Halsall, D., Huxham, S. & Worthington, D. J., 2007, In: Journal of the Operational Research Society. 58, p. 1554-1562 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  46. Published

    Time-dependent analysis of virtual waiting time behaviour in discrete time queues

    Wall, A. & Worthington, D. J., 2007, In: European Journal of Operational Research. 178, 2, p. 482-499 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  47. Published

    What is a ''generic'' hospital model?

    Fletcher, A. & Worthington, D. J., 2007, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  48. 2006
  49. Published

    Modelling and testing the assessment of risk of defaulting of companies in the context of the Basel Accord

    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2006, In: Panorama Socioeconómico . 33, p. 76-85 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  50. Published

    Statistical modelling of defaulting companies for the Basel Accord: a Brazilian case study

    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2006, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  51. Published

    The DH accident and emergency department model - a national generic model used locally

    Fletcher, A., Halsall, D., Huxham, S. & Worthington, D. J., 2006, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  52. 2005
  53. Published

    A simulation based study of a NHS walk-in centre

    Ashton, R., Hague, L., Brandreth, M., Worthington, D. J. & Cropper, S., 2005, In: Journal of the Operational Research Society. 56, 2, p. 153-161 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  54. Published

    Operational research modelling to support healthcare operations management

    Worthington, D. J., 2005, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  55. Published

    Scheduling appointments in outpatient clinics

    Worthington, D. J., Goulsbra, R. & Rankin, J., 2005, Health Operations Management. London and New York: Routledge, p. 223-248 26 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  56. Published

    The effective management of intensive care: a case study integrating hard and soft methods

    Kowalczyk, R. H. & Worthington, D. J., 2005, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  57. Published

    Time-dependent analysis of virtual waiting time behaviour in discrete time queues

    Wall, A. & Worthington, D. J., 2005, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  58. 2004
  59. Published

    A new model for call centre queue management

    Chassioti, E. & Worthington, D. J., 2004, In: Journal of the Operational Research Society. 55, 12, p. 1352-1357 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  60. Published

    Models to estimate average route lengths in different geographical environments

    Hindle, A. J. & Worthington, D. J., 2004, In: Journal of the Operational Research Society. 55, 6, p. 662-666 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  61. Published

    Performance analysis of make-to-order manufacturing systems under different workload control

    Haskose, A., Kingsman, B. G. & Worthington, D. J., 2004, In: International Journal of Production Economics. 90, 2, p. 169-186 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  62. 2002
  63. Published

    Applications of MS/OR in health services

    Worthington, D. J., 2002, The Informed Student Guide to Management Science. London: Thomson Learning, p. 21-22 2 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  64. Published

    Modelling flow and jobbing shops as a queuing network for workload control

    Haskose, A., Worthington, D. J. & Kingsman, B. G., 2002, In: International Journal of Production Economics. 78, p. 271-285 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  65. 1999
  66. Published

    Using the discrete time modelling approach to evaluate the time-dependent behaviour of queuing systems

    Worthington, D. J. & Wall, A., 1999, In: Journal of the Operational Research Society. 50, 8, p. 777-788 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  67. Published

    Variations in access, uptake and equity: radiology services

    Worthington, D. J., Kowalczyk, R. H., Dalziel, M. & Robinson, P., 1999, Lancaster University: The Department of Management Science, (Management Science Working Paper Series).

    Research output: Working paper

  68. 1998
  69. Published

    An example of a good but partially successful OR engagement: improving outpatient clinic operations

    Worthington, D. J. & Bennett, J. C., 1998, In: Interfaces. 28, 5, p. 56-69 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  70. Published

    Speciality location decisions in the reformed NHS: a case study

    Hindle, A., Roberts, E. A. M. & Worthington, D. J., 1998, In: Health Services Management Research. 11, p. 174-181 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  71. 1997
  72. Published

    Queue management: what has a DSS approach to offer to improve the running of outpatient clinics?

    Worthington, D. J., 1997, Enhancing Health Services Management: The Role of Decision Support Systems. Oxford: Oxford University Press, p. 177-198 22 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

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