Research

Areas

  1. Decision Analysis and Risk Management in Large, Complex Systems including Technological, Financial, Economic, Energy & Environmental, and Biomedical Systems
  2. Intelligent and Adaptive Decision Support Systems
  3. Large-Scale Systems Optimization
1. Decision Analysis and Risk Management in Large, Complex Systems including Technological, Financial, Economic, Energy & Environmental, and Biomedical Systems.

Research in this area seeks to develop all aspects of the mathematics and methodologies of decision making and risk management in large, complex systems be they technological, business, finance, economic, energy & environmental, or biomedical. The program examines decision making and risk from various perspectives, including operational and strategic; development of techniques for sustainable decision making in conditions of uncertainty, conflict, and time criticality; making sense of many sources of information, etc.

Current and past projects include:

  • Valuation of risky projects using decision analysis and real options.
  • Managing risk of logistics and supply chains disruptions.
  • Interdependent critical infrastructure protection and risk management.
  • Multiple criteria decision analysis approach to evaluating strategies for long-term energy security.
  • Portfolio optimization approach to fuel-mix strategies for long-term energy security and risk management.
  • Multiple attribute decsion making approach to alternatives fuels for land transportation.
  • Systems architecture decision under uncertainty.
  • Value of information and misinformation in games and decision making.
  • Independent component analysis in classifications.
  • Dealing with missing values in DNA microarray data.
2. Intelligent and Adaptive Decision Support Systems.

Research in this area seeks to understand and enhance the intelligent problem solving capabilities of humans and human-computer systems. It focuses on the design and development of computer-based decision systems that aid human decision makers in structuring and solving complex problems.

Current and past projects include:

  • Intelligent adaptive decision systems with application to job shop scheduling.
  • Dynamic construction of situation-specific decision models from knowledge sources.
  • Graphical modeling, inference, and learning in multi-agent decision systems.
  • Time-critical dynamic decision making in medicine and security.
  • Intelligent multiple criteria decision systems.
  • Medical decision support systems for management of diseases.
  • Graphical modeling and solution of asymmetric games and multi-level games.
3. Large-Scale Systems Optimization

Research in this area focuses on modeling and optimization of complex large-scale systems, including the use of heuristics and meta-heuristics, the development of computationally tractable approach for finding optimal or near optimal solutions.

Current and past projects include:

  • Educational timetabling problems.
  • Large-scale roistering of personnel to tasks and resources.
  • Manpower planning for semi-conductor manufacturing.
  • Multi-period asset allocation with behaviorial utilities.
  • Value-at-Risk approach to the weapons assignment optimization problem.
  • Network interdiction problem.
  • Multi-period multi-commodity transportation with capacitated heterogeneous fleet.
  • Reliability of software and distributed computing systems.

Recent Funded Projects

  • Adaptive Intelligent Decision Systems.
    The purpose of this project is to develop adaptive intelligent systems for decision support for time-critical applications in dynamic and uncertain environments. We have completed a comprehensive literature survey and have developed systems architectures, decision models and computational algorithms for adaptive reasoning and decision making in two domains, namely (1) adaptive manufacturing job-shop systems and (2) adaptive multi-agent systems. These are domains with significant applications in the real world and in the industry. The proposed architectures and algorithms were evaluated and tested in a virtual environment using discrete events simulations developed specially for the two domains.

    In the adaptive manufacturing decision support systems, the dynamic job-shop scheduling and rescheduling under uncertainty in a manufacturing environment was studied. Dynamic Bayesian Networks and Influence Diagrams construction approaches have been adopted as the main formalism in the system. This work advances the current state of the art in industrial jobs-shop scheduling and will enable the building of more effective decision support systems for industrial applications such as in the electronics and semi-conductor manufacturing sectors.

    In the adaptive multi-agent decision systems, the rocks forging problem has been selected as the application problem. The system was tested for the effectiveness of the various agents' decision making rules, how information are communicated and shared among the cooperative agents, as well as the agent's learning schemes. This work advances the current state of the art in the architecting of decision support systems that has to deal with multiple players. These are applicable to the building of command & control systems in many domains such as military, maritime security, air-traffic control etc.

  • Advanced Planning & Decision Systems.
    This project is funded by the Defense Sciecne and Technology Agency's (DSTA) Defense Innovative Research Program and is in collaboration with Decision Support Solutions Center of DSTA. The fundamental goal of this project is to develop a set of advanced computational techniques and algorithms that facilitate the building of advanced planning systems for allocation of resources and intelligent decision systems that are capable of responding to sensory inputs and providing optimal course of action to decision makers in an uncertain and dynamic environment. The project will focus on the optimization of large-scale rosters that combines column generation with constraint programming, and the development of intelligent normative decision systems for automated reasoning and decision making in an uncertain and dynamic environment.

  • Intelligent Prognostic Analysis in Medicine.
    This Agency for Science, Technology & Research (A*STAR) funded-project is in collaboration with the Department of Computer Science, Department of Medicine, the National Neuroscience Institute of Singapore, Johns Hopkins Hospital of USA, and ReasonEdge Technologies. This work aims to develop a set of advanced decision engineering techniques to support effective prognostic analysis in medicine; the resulting techniques will be incorporated into a set of prototype applications that automate clinical practice guideline generation in significant and time-critical health care domains. Prognostic analysis is a critical part of evidence-based medicine that emphasizes the effective use of information to improve quality, reduce variation, and manage resources in health care procedures. Prognostic analysis illuminates the natural, as well as the expected, post-intervention course and outcome of disease processes. It plays an important role in care management tasks, including cost-effective diagnostic test and treatment planning, prognostic prediction, pharmacoeconomic analysis, health technology and policy assessment, and clinical practice guideline generation.

Other Funded Projects