Faculty

International airfreight forwarders are faced with the problem of consolidating shipments for effcient transportation by airline carriers. The use of standard unit loading devices (ULDs) is a solution adopted by the airfreight industry to speed up cargo loading, increase safety, and protect cargo. We study the airfreight consolidation problem from the forwarders perspective where a decision on the number of ULDs used and the assignment of shipments to ULDs is optimized. The cost of using a ULD consists of a fixed charge and depends on the weight of the cargo it contains.

Supervisor

Jatin Nathwani

Area of Research

Management of Technology

Committee Chair

Mark Aagaard - Electrical and Computer Engineering

Examining Committee

Bonwoo Koo (Supervisor) - Management Sciences

Brian Cozzarin - Management Sciences

Selcuk Onay - Management Sciences

Margaret Dalziel - CBET

Cutting and Packing problems are hard combinatorial optimization problems that arise in the context of several manufacturing and process industries or in their supply chains. These problems occur whenever a bigger object or space has to be divided into smaller objects or spaces, so that waste is minimized.

Accounting for the adverse impact of "non-average" events has become essential in many applications involving decision making under uncertainty. Its implementation through decision models, namely stochastic programs, requires careful measurement of risk that reflects one's concern about uncertain outcomes. Important theories such as convex risk measures outline conditions required for risk measurement but provide little guidance for cases not meeting the conditions. Unfortunately, such cases are more than common in real-life situations.

Consider a buyer participating in a repeated auction, such as those prevalent in display advertising. How would she test whether the auction is incentive compatible? To bid effectively, she is interested in whether the auction is single-shot incentive compatible—a pure second-price auction, with fixed reserve price, and also dynamically incentive compatible—her bids are not used to set future reserve prices. In this work we develop tests based on simple bid perturbations that a buyer can use to answer these questions, with a focus on dynamic incentive compatibility.

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Abstract

Production planning problems and its variants are widely studied in operations management and optimization literature. One variation that has not garnered much attention is the presence of multiple production families in a coordinated and capacitated lot-sizing setting. While its single-family counterpart has been the subject of many advances in formulations and solution techniques, the latest published research on multiple family problems was over 25 years ago (Erenguc and Mercan, 1990; Mercan and Erenguc, 1993).

Area of Research:

Information Systems

Committee Chair:

Stan Potapenko, Civil & Environmental Engineering

Examining Committee:

Stanko Dimitrov, Management Sciences (supervisor)

Fatih Erenay, Management Sciences

James Bookbinder, Management Sciences

Liping Fu, Civil & Environmental Engineering