Our doctoral programme aims at nurturing a small group of outstanding students to become world-class academicians and practitioners in the fields of Operations and Business Analytics, which have far-reaching applications including, but not limited to, logistics, supply chain management, manufacturing, service, transportation, and healthcare management. It is a multidisciplinary programme that incorporates areas in Operations Management, Business Analytics, Management Science, Economics, Statistics, Operations Research, Behavioural Science and Information Systems.

Through well-planned, sequenced PhD coursework and intense hands-on research experiences with faculty members on joint research projects, it imbues students with a broad spectrum of analytical methods such as mathematical optimisation, applied probability, econometrics and equilibrium analysis, which they can apply to analyse, develop new insights and improve decision making in problems that arise in complex business operations environment.

We provide competitive four-year research scholarships for all qualified PhD students. Students can also receive supplemental support as teaching and/or research assistants. The School encourages and supports students’ participation at international conferences and workshops, and is constantly introducing new fellowships and schemes promoting students’ development including lecture series by distinguished professors.

Successful applicants are likely to have strong mathematical skills and outstanding degrees in any rigorous disciplines. The School admits PhD students every August. Admission in January will be considered only in very special cases.


Students will take five core modules, which are generally offered in the first year. In addition, students will have to take an at least 20 modular credits (MCs) of PhD-level modules, or equivalently to five full semester long courses.  The elective modules include courses offered by other academic units in NUS and also specialised short courses given by visiting professors. 

Core Modules

  1. Foundations of Optimisation
  2. Stochastic Processes
  3. Foundations of Inventory Management     
  4. Logistics and Supply Chain
  5. Economic Modeling for Management Research

 Elective Modules

A sample of the elective modules offered by the department includes:

  1. Convex Optimisation
  2. Discrete Optimisation and Applications      
  3. Robust Optimisation
  4. Stochastic Modeling and Optimisation
  5. Simulation Modeling and Analysis
  6. Operations Management
  7. Operations and Process Design
  8. Seminars on specialized topics of interest

Click here for more information on modules offered. 

Qualifying Examination

All doctoral candidates in the Department of Decision Sciences must complete and pass the Qualifying Examination (QE) by the end of the second year. The QE has two-parts as follows: 

Part I Written Examination

Part I evaluates the students’ mastery of the technical tools necessary for research and will be scheduled at the end of their study in Year 1. It comprises three closed book written exams based on the core modules:

  1. Foundations of Optimisation
  2. Stochastic Processes
  3. Foundations of Inventory Management 

Part II Research Oriented (RO) Paper Examination

Students who have passed the written QE can commence work on the research-oriented (RO) paper, which will be submitted for examination towards the end of Year 2.  The purpose of the RO paper is to examine students’ ability to conduct independent research under guidance of their faculty mentors. 

For details on admission and application, please visit

PhD Coursework 

Please note that we are no longer accepting MSc applications.