Technical Sessions – Monday July 11

TB-03 IFORS 2011 - Melbourne
An electronic book will be considered as the digital version of a traditional
printed book to be read digitally on a PC, PDA or a dedicated e-book reader.In
this paper, a strategic market analysis framework in a publishing market is proposed
in the presence of multiple competing publishers.The proposed publishing
market consists of p-publishers that try to decide on whether or not switch
to e-publishing.The framework computes the unit prices, and profits of the publishers
in each market scenario.
2 - Leader-follower Optimization in Product Design
Gang Du, School of Management, Tianjin University, 300072,
Tianjin, China, tddg@tju.edu.cn, Yan Li, Yi Xia
Based on the summarize of the problems of leader-follower optimization in
product design, the types and the decision systems are proposed in this paper.
The models and the methods are discussed which involved Stackelberg Games
and engineering optimization methods. Furthermore the product family and
complex product optimization problems are discussed.
3 - The Welfare Effects of Horizontal Mergers in Markets
with Negative Welfare Effects
Andrea Mantovani, Department of Economics, University of
Bologna, Strada Maggiore 45, 40125, Bologna, Italy,
a.mantovani@unibo.it, Luca Lambertini
We model horizontal mergers in a differential Cournot game with pollution, obtaining
an admittedly provocative result. Given that the externality increases in
industry output, it turns out that any horizontal merger poses a tradeoff between
the increase in concentration and the external effect. We single out the size of
the horizontal merger beyond which the reduction in the externality more than
compensate the price increase. Additionally, we calculate the level of Pigouvian
taxation that would reproduce exactly the same welfare effect of such a
merger.
� TB-03
Tuesday, 11:00-12:30
Meeting Room 102
Modern Heuristics in Transportation
Stream: Meta-heuristics
Invited session
Chair: Ana Costa, Civil Engineering Dept., University of Coimbra,
Rua Luís Reis Santos, Polo II da UC, 3030 - 788, Coimbra, Portugal,
alcosta@dec.uc.pt
1 - Passenger and Pilot Risk Minimization in Offshore Helicopter
Transportation
Fubin Qian, Molde University College, Fannestrandveien 76,
6416, Molde, Norway, fubin.qian@himolde.no, Irina
Gribkovskaia, Gilbert Laporte, Oyvind Halskau
In the offshore petroleum industry, employees are transported to and from the
offshore installations by helicopter, which represents a major risk. This paper
analyzes how to improve transportation safety by solving the helicopter routing
problem with an objective expressed in terms of expected number of fatalities.
A mathematical model is proposed and a tabu search heuristic is applied to
this problem. Three routing policies are considered: a direct service policy, a
Hamiltonian solution policy, and a general solution policy.Extensive computational
experiments are conducted.
2 - Efficient Metaheuristics for Intermodal Terminal Location
Kenneth Sörensen, Faculteit Toegepaste Economische
Wetenschappen, Universiteit Antwerpen, Prinsstraat 13, 2000,
Antwerpen, Belgium, kenneth.sorensen@ua.ac.be, Christine
Vanovermeire
Determining the optimal number and location of intermodal transshipment terminals
is a decision that strongly influences the viability of the intermodal
transportation alternative. In this talk, we discuss a model and two different
metaheuristic procedures to solve it. The first metaheuristic constructs solutions
using a GRASP procedure, the second one uses the relatively unknown
Attribute Based Hill Climber (ABHC) heuristic. Innovative in our approach is
the integration of a fast heuristic procedure to approximate the total cost given
the set of open terminals.
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3 - Addressing a Last Mile Transportation Problem
Kwong Meng Teo, Industrial & Systems Engineering, National
University of Singapore, Singapore, kwongmeng@alum.mit.edu,
Viet Anh Nguyen
Mobility-on-demand can improve urban transportation by removing commuters
from the system more quickly while reducing vehicles on the road. We
study a system of delivering passengers from a transportation hub to their individual
destinations, or the Last Mile Problem. We extend a heuristics-based
routing routine, which address the static problem in seconds, to (i) accept firstmile
commuters, (ii) handle practical exceptions such as unanticipated spike
in demand and weather-related delays, and (iii) handle the dynamic problem,
where each vehicle will make multiple deliveries from the hub.
4 - A Tool for High-speed Railway Alignment Optimization:
Application to Case Studies of Increasing Complexity
Ana Costa, Civil Engineering Dept., University of Coimbra, Rua
Luís Reis Santos, Polo II da UC, 3030 - 788, Coimbra, Portugal,
alcosta@dec.uc.pt, Maria Cunha, Paulo Coelho, Herbert Einstein
Planning of High-Speed Railways must consider multiple and uncertain future
conditions under which to perform (e.g. floodings, earthquakes). Options
in corridors and technical solutions to adopt exist and different solutions may
yield different overall performance. This paper discusses a systematic tool developed
to address this specific problem. The Simulated Annealing Algorithm
(SAA) is implemented to solve the alignment optimization model. Applications
to case studies of increasing complexity and size are presented. The estimation
of the SAA parameter combination yielding the best results and the influence
of the problem specifics in the process are discussed.
� TB-04
Tuesday, 11:00-12:30
Meeting Room 103
New Directions in Operations Management
Stream: Operations Management
Invited session
Chair: Ronald Askin, Arizona State University, 85287, Tempe, AZ,
United States, ron.askin@asu.edu
1 - Qualification Management for Semiconductor Assembly
and Test Facilities
Ronald Askin, Industrial Engineering, Arizona State University,
Computing, Informatics and Dec. Systems Engineering, PO Box
8809, 85287-8809, Tempe, AZ, United States,
ron.askin@asu.edu, John Fowler, Mengying Fu, Muhong Zhang
We consider a multiproduct flexible flow system with parallel machines at each
stage. Machine qualification is necessary prior to utilizing a specific machine
for a product. Qualification consumes valuable production and engineering
time but increases flexibility that is useful for accommodating random, bulk
demands. In this talk we provide deterministic and stochastic models to optimize
qualification decisions and implement these models in a user-friendly
system.
2 - Effect of Retailer and Consumer Stockpiling on Pass-
Through of Manufacturer’s Discounts
Candace Yano, University of California, Berkeley, United States,
yano@ieor.berkeley.edu, Huanhuan Qi
Empirical studies indicate that when manufacturers offer discounts to retailers,
retailers rarely pass on the full amount of the discount to customers. We study
a scenario in which retailers stockpile inventory in response to manufactureroffered
discounts and customers stockpile in response to retailer-offered discounts.
We characterize the retailer’s optimal discounting and ordering policy
and the manufacturer’s optimal discounting strategy in view of the retailer’s
response to it, and the customer’s response to the retailer’s strategy.
3 - Evolution of Manufacturing Systems: A Model Based
View
John Buzacott, Schulich Business School, York University,
203-955 Millwood Road, M4G 4E3, Toronto, Ontario, Canada,
jbuzacot@schulich.yorku.ca