Portrait of Dr Navid Izady

Dr Navid Izady

Reader in Operations & Supply Chain

Bayes Business School , Faculty of Management

Contact

About

Overview

Dr. Izady received his PhD in Management Science from Lancaster University Management School in 2010, following a BSc and an MSc in Industrial Engineering from Sharif University of Technology in IRAN. He was then offered a lectureship position at the University of Southampton, jointly at the School of Mathematical Sciences and Southampton Business School under the EPSRC LANCS Initiative, where he worked for five years before joining Bayes in 2015.

Dr. Izady's research interests lie in stochastic modelling of service and manufacturing operations, in particular those relevant to healthcare. He has collaborated with a wide range of hospitals and healthcare organizations through supervision of sponsored MSc and PhD projects and undertaking consultancy projects. Dr. Izady has taught modules in operations management, stochastic modelling and simulation, healthcare modelling, mathematical modelling, and decision modelling and analysis to BSc, MSc and MBA students.

Qualifications

  • BSc (Ind Engg, SUT)
  • MSc (Ind Engg, SUT)
  • PhD (Mgmt Sci, LUMS)

Languages

Persian

Expertise

Primary topics

  • Operations Research
  • Simulation Methods
  • Statistics
  • Stochastic Processes

Additional topics

  • Management Science
  • Mathematical & Quantitative Methods
  • Operations Management

Industries

  • health care
  • manufacturing

Research

My interest is in performance modelling and optimization of business processes involving uncertainty, in particular those observed in healthcare operations. Examples include optimal staffing of accident and emergency (A&E) departments, capacity and demand planning in outpatient clinics, and resource planning including beds and staff in critical care units.

Research topics

Optimal capacity and demand planning in networks of outpatient clinics

Partial pooling of resources in hospital wards

Integrated disease progression modelling and resource planning in healthcare

Research students

1stsupervisor

  • Saha Malaki, Research Student

Publications

Chapters (2)

  1. Izady, N. (2026). Operations measures for inpatient beds in hospitals. Encyclopedia in Operations Management (pp. Vol4-V606).
  2. Izady, N. (2026). Operations measures for inpatient beds in hospitals. Encyclopedia in Operations Management (pp. 598-606). Elsevier. ISBN 9780443289941.

Conference papers and proceedings (5)

  1. Izady, (2015). A Discrete-Time Modelling Framework for Supply and and Demand Planning in Outpatient Clinics. The 18th INFORMS Applied Probability Conference 5-8 July, Istanbul, Turkey.
  2. Izady, (2014). A State-Dependent Bulk Service Model For Capacity Planning in Health Care Clinics. First European Conference on Queueing Theory (ECQT 2014) 20-22 August, Ghent, Belgium.
  3. Izady, (2013). Appointment Capacity Planning in Specialty Care Clinics: A Queueing Approach. EURO-INFORMS Joint International Meeting Rome, Italy.doi:10.1287/opre.2015.1391
  4. Izady, N. (2012). A Queueing Model for Estimating Indirect Waiting Time Distribution in Outpatient Clinics. OR54 - The Operational Research Society Annual Conference 4-6 September, Edinburgh, UK.
  5. Izady, N. and Worthington, D. (2011). Service evaluation of Non-stationary queues: A review. OR53 - The Operational Research Society Annual Conference 6-8 September, East Midlands Conference Centre (EMCC), The University of Nottingham, UK.

Journal articles (11)

  1. Izady, N., Savin, S. and Zanjirani Farahani, R. (2026). Preparing for the Next Health Emergency: The Effect of Facility Specialization in Concurrent Management of Pandemic and Non-Pandemic Demand. Manufacturing & Service Operations Management
  2. Zamani, H., Parvaresh, F., Izady, N. and Zanjirani Farahani, R. (2024). Admission, discharge, and transfer control in patient flow logistics: Overview and future research. Transportation Research Part E: Logistics and Transportation Review, 191, pp. 103722-103722. doi:10.1016/j.tre.2024.103722

    [publisher’s website]

  3. Izady, N., Arabzadeh, B., Sands, N. and Adams, J. (2024). Reconfiguration of inpatient services to reduce bed pressure in hospitals. European Journal of Operational Research, 316(2), pp. 680-693. doi:10.1016/j.ejor.2024.02.008

    [publisher’s website]

  4. Malaki, S., Izady, N. and de Menezes, L.M. (2023). A framework for optimal recruitment of temporary and permanent healthcare workers in highly uncertain environments. European Journal of Operational Research, 308(2), pp. 768-781. doi:10.1016/j.ejor.2022.12.008

    [publisher’s website]

  5. Izady, N. and Mohamed, I. (2021). A Clustered Overflow Configuration of Inpatient Beds in Hospitals. Manufacturing & Service Operations Management, 23(1), pp. 139-154. doi:10.1287/msom.2019.0820

    [publisher’s website]

  6. Izady, N. (2019). An Integrated Approach to Demand and Capacity Planning in Outpatient Clinics. European Journal of Operational Research. doi:10.1016/j.ejor.2019.06.001

    [publisher’s website]

  7. Izady, N. (2015). Appointment Capacity Planning in Specialty Clinics: A Queueing Approach. Operations Research, 63(4), pp. 916-930. doi:10.1287/opre.2015.1391

    [publisher’s website]

  8. Izady, N. and Worthington, D. (2012). Setting staffing requirements for time dependent queueing networks: The case of accident and emergency departments. European Journal of Operational Research, 219(3), pp. 531-540. doi:10.1016/j.ejor.2011.10.040

    [publisher’s website]

  9. Izady, N. and Worthington, D. (2011). Approximate analysis of non-stationary loss queues and networks of loss queues with general service time distributions. European Journal of Operational Research, 213(3), pp. 498-508. doi:10.1016/j.ejor.2011.03.029

    [publisher’s website]

  10. Izady, N. and Mahlooji, H. (2008). Developing a Wide Easy-to-Generate Class of Bivariate Copulas. Communications in Statistics - Theory and Methods, 37(12), pp. 1919-1929. doi:10.1080/03610920801893814

    [publisher’s website]

  11. Mahlooji, H., Jahromi, A.E., Mehrizi, H.A. and Izady, N. (2008). Uniform fractional part: A simple fast method for generating continuous random variates. Scientia Iranica, 15(5), pp. 613-622

Working papers (2)

  1. Malaki, S., Izady, N., Ceryan, O. and de Menezes, L.M. (2025). Optimal Recruitment of Temporary and Permanent Healthcare Workers in Highly Uncertain Environments: A Long-Term Scenario.
  2. Izady, N. Pooling of Samples to Increase Testing Capacity for COVID-19. City, University of London

Professional activities

Consultancy (2)

  1. Whiston Hospital (Public Sector) (October 2012 - March 2013)
    Staff Scheduling of Clinicians in the Accident & Emergency Department
  2. Queen Alexandra Hospital (Public Sector) (October 2012 - April 2013)
    A Simulation Model for Reconfiguration of the Accident & Emergency Department

Editorial activity (6)

  1. IIE Transactions, Referee, 2015 - present.
  2. Journal of the Operational Research Society, Referee, 2013 - present.
  3. International Journal of Production Economics, Referee, 2013 - present.
  4. Healthcare Management Science, Referee, 2012 - present.
  5. International Journal of Production Research, Referee, 2012 - present.
  6. European Journal of Operational Research, Referee, 2010 - present.

Events/conferences (6)

  1. The 18th INFORMS Applied Probability Conference. (Conference) Istanbul/Turkey (2015). Invited speaker.
    Paper: A Discrete-Time Modelling Framework for Supply and and Demand Planning in Outpatient Clinics
    Author: Izady N
  2. Seventh International Workshop on Practical Applications of Stochastic Modelling. (Workshop) Newcastle/UK (2014). Invited speaker.
    Paper: Three Case Studies on the Applications of Queueing Models in Healthcare
    Author: Izady N
  3. First European Conference on Queueing Theory. (Conference) Ghent/Belgium (2014). Invited speaker.
    Paper: A State-Dependent Bulk Service Model For Capacity Planning in Health Care Clinics
    Author: Izady N
  4. EURO-INFORMS Joint International Meeting. (Conference) Rome/Italy (2013).
    Paper: Appointment Capacity Planning in Specialty Care Clinics: A Queueing Approach
    Author: Izady N
  5. OR54 Annual Conference. (Conference) Edinburgh/UK (2012). Invited speaker.
    Paper: A Queueing Model for Estimating Indirect Waiting Time Distribution in Outpatient Clinics
    Author: Izady N
  6. OR53 Annual Conference. (Conference) Nottingham/UK (2011). Invited speaker.
    Paper: Service Evaluation of Non-stationery Queues
    Author: Izady N
    Co-authors: Dave Worthington