Dept. of Industrial Engineering - Ph.D. / Sc.D.
Recent Submissions
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Optimizing airline operations under uncertainty
(Bilkent University, 2019-06)Fluctuations in passenger demand, airport congestion, and high fuel costs are the main threats to airlines' profit, thereby need to be carefully addressed in airline scheduling problems. This study takes an advantage of ... -
Network design problems and value of control mechanisms in power systems
(Bilkent University, 2019-06)Power systems planning and operations is one of the most challenging problems in energy field due to its complex, large-scale and nonlinear nature. Operating power systems with uncertainties and disturbances such as ... -
Green location and routing problems with conventional vehicles and drones
(Bilkent University, 2019-06)Green Location and Routing Problems extend the network design problems that consider location and routing decisions by explicitly accounting environmental impacts such as CO2 emissions caused by fuel or energy consumption ... -
Risk-averse multi-stage mixed-integer stochastic programming problems
(Bilkent University, 2019-01-29)Risk-averse multi-stage mixed-integer stochastic programming problems form a class of extremely challenging problems since the problem size grows exponentially with the number of stages, they are non-convex due to ... -
Age and lifetime based policies for perishable items
(Bilkent University, 2018-11)Many inventory systems hold items which perish after a specific time. Upon perishing, the inventory level falls down to zero which may incur irreparable costs to the system. Therefore, developing a genius control policy ... -
Concepts and analysis in facility location under uncertainty : applications to 1-median problem
(Bilkent University, 2001-08) -
Terrain visibility and guarding problems
(Bilkent University, 2017-11)Watchtowers are located on terrains to detect fires, military units are deployed to watch the terrain to prevent infiltration, and relay stations are placed such that no dead zone is present on the terrain to maintain ... -
Exact solution approaches for non-Hamiltonian vehicle routing problems
(Bilkent University, 2017-08)In this thesis, we study di erent non-Hamiltonian vehicle routing problem variants and concentrate on developing e cient optimization algorithms to solve them. First, we consider the split delivery vehicle routing problem ... -
Designing intervention strategy for public-interest goods
(Bilkent University, 2016-09)Public-interest goods, which are also referred as goods with positive externalities, create benefits to individual consumers as well as non-paying third parties. Some significant examples include health related products ... -
Robust portfolio optimization with risk measures under distributional uncertainty
(Bilkent University, 2016-08)In this study, we consider the portfolio selection problem with different risk measures and different perspectives regarding distributional uncertainty. First, we consider the problem of optimal portfolio choice using the ... -
Scheduling in flexible robotic manufacturing cells
(Bilkent University, 2006)The focus of this thesis is the scheduling problems arising in robotic cells which consist of a number of machines and a material handling robot. The machines used in such systems for metal cutting industries are ... -
Quadratic assignment problem : linearizations and polynomial time solvable cases
(Bilkent University, 2006)The Quadratic Assignment Problem (QAP) is one of the hardest combinatorial optimization problems known. Exact solution attempts proposed for instances of size larger than 15 have been generally unsuccessful even ... -
Optimization of transportation requirements in the deployment of military units
(Bilkent University, 2005)We study the deployment planning problem (DPP) that may roughly be defined as the problem of the planning of the physical movement of military units, stationed at geographically dispersed locations, from their home ... -
Stochastic joint replenishment problem : a new policy and analysis for single location and two eclehon inventory systems
(Bilkent University, 2005)In this study we examine replenishment coordination strategies for multiple item or multiple location inventory systems In particular we propose a new parsimonious control policy for the stochastic joint replenishment ... -
Discrete location models for content distribution
(Bilkent University, 2005)The advances in information and computer technology has tremendously eased the way to reach electronic information. This, however, also brought forth many problems regarding the distribution of electronic content. This ... -
Essays on scheduling with controllable processing times in flexible manufacturing systems
(Bilkent University, 2003) -
Lot sizing with nonlinear production cost functions
(Bilkent University, 2015-07)In this study, we consider di erent variations of the lot sizing problem encountered in many real life production, procurement and transportation systems. First, we consider the deterministic lot sizing problem with ... -
Nonlinear mixed integer programming models and algorithms for fair and efficient large scale evacuation planning
(Bilkent University, 2015-07)Shelters are safe facilities that protect a population from possible damaging effects of a disaster. Traffic management during an evacuation and the decision of where to locate the shelters are of critical importance to ... -
Production decisions with convex costs and carbon emission constraints
(Bilkent University, 2016-03)In this thesis, di erent variants of the production planning problem are considered. We rst study an uncapacitated deterministic lot sizing model with a nonlinear convex production cost function. The nonlinearity and ... -
Energy management in plug-in hybrid electric vehicle penetrated networks
(Bilkent University, 2016-04)With the introduction of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) into the transportation system, a new line of research has emerged in the literature that reconsiders existing problems from ...
