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Research

Dr David Worthington

Senior Lecturer

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  1. Working paper
  2. Unpublished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    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2012, (Unpublished).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

  3. Unpublished

    Comparing modelling approaches for corporate credit scoring using multi-level categories of risk

    Minussi, J., Soopramanien, D. G. R. & Worthington, D. J., 2012, (Unpublished).

    Research output: Working paper

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. Journal article
  14. Published

    Cost of treatment support for multidrug-resistant tuberculosis using patient-centred approaches in Ethiopia: a model-based method

    Rosu, L., Morgan, L., Tomeny, E. M., Worthington, C., Jin, M., Nidoi, J. & Worthington, D., 7/07/2023, In: Infectious diseases of poverty. 12, 1, 65.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  15. E-pub ahead of print

    A Spline Function Method for Modelling and Generating a Nonhomogeneous Poisson Process

    Morgan, L., Nelson, B., Titman, A. & Worthington, D., 19/06/2023, (E-pub ahead of print) In: Journal of Simulation. 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  16. Published

    A multi-fidelity modelling approach for airline disruption management using simulation

    Rhodes-Leader, L., Nelson, B., Onggo, S. & Worthington, D., 31/10/2022, In: Journal of the Operational Research Society. 73, 10, p. 2228-2241 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  17. 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 Journal/Magazine › Journal article › peer-review

  18. 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 Journal/Magazine › Journal article › peer-review

  19. 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, (E-pub ahead of print) In: Health Care Management Science. 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  20. 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 Journal/Magazine › Journal article › peer-review

  21. 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 Journal/Magazine › Journal article › peer-review

  22. 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 Journal/Magazine › Journal article › peer-review

  23. 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 Journal/Magazine › Journal article › peer-review

  24. 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 Journal/Magazine › Journal article › peer-review

  25. 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 Journal/Magazine › Journal article › peer-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 Journal/Magazine › Journal article › peer-review

  27. 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 Journal/Magazine › Journal article › peer-review

  28. 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 Journal/Magazine › Journal article › peer-review

  29. 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 Journal/Magazine › Journal article › peer-review

  30. 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 Journal/Magazine › Journal article › peer-review

  31. 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 Journal/Magazine › Journal article › peer-review

  32. 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 Journal/Magazine › Journal article › peer-review

  33. 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 Journal/Magazine › Journal article › peer-review

  34. 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 Journal/Magazine › Journal article › peer-review

  35. 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 Journal/Magazine › Journal article › peer-review

  36. 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 Journal/Magazine › Journal article › peer-review

  37. 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 Journal/Magazine › Journal article › peer-review

  38. 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 Journal/Magazine › Journal article › peer-review

  39. 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 Journal/Magazine › Journal article › peer-review

  40. 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 Journal/Magazine › Journal article › peer-review

  41. 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 Journal/Magazine › Journal article › peer-review

  42. 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 Journal/Magazine › Journal article › peer-review

  43. Conference paper
  44. 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 paper › peer-review

  45. 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 paper › peer-review

  46. Published

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

    Al-Ghaith, T., Brown, D. & Worthington, D., 8/06/2011.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  47. 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 paper › peer-review

  48. Abstract
  49. Published

    To what extent can simulation optimisation be used in wildlife conservation?

    Zhou, S., Worthington, D., Rhodes-Leader, L. & Williams, R., 27/03/2023, Proceedings of the Operational Research Society Simulation Workshop 2023 (SW23). Operational Research Society, Vol. 1. p. 285

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Abstract

  50. Conference contribution/Paper
  51. Published

    Simulation For Evaluating Long-term Maintenance Plans For Complex Systems

    Rhodes-Leader, L., Worthington, D., Griffiths, I. & Samartzis, P., 31/03/2023, Proceedings of the 11th Operational Research Society Simulation Workshop (SW23). Currie, C. & Rhodes-Leader, L. (eds.). Operational Research Society, p. 272-282 11 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  52. 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/ISSN › Conference contribution/Paper › peer-review

  53. 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/ISSN › Conference contribution/Paper › peer-review

  54. 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/ISSN › Conference contribution/Paper › peer-review

  55. 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/ISSN › Conference contribution/Paper › peer-review

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