Informs 2015

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INFORMS Philadelphia – 2015
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4 - An Efficient VNS Heuristic for the Pickup and Delivery Traveling
Salesman Problem with FIFO
Jin Qin, Doctoral Student, Huazhong University of Science &
Technology, 1037 Luoyu Road, Wuhan, China, Wuhan, China,
, Qinghua Wu, Xianhao Xu
In this paper, we present an variable neighborhood search(VNS) algorithm to
solve an variant of the traveling salesman problem with pickup and
delivery(TSPPD), named the TSPPD with first-in-first-out loading (TSPPDF). The
VNS heuristic cooperate with a Simulated Annealing(SA) and two Tabu
Search(TS)to solve this problem. Numerical experiment results show that the
proposed heuristic produces better solutions than do the previous methods in
relatively short computing times.
5 - Heuristic Methods for Automotive Stamping Scheduling
Sayak Roychowdhury, PhD Student, The Ohio State University,
1971 Neil Avenue, Columbus, Oh, 43210, United States of
America, Theodore Allen
A major automotive manufacturer plans parts to be made by a large stamping
machine on a seven day basis to conform to an overall vehicle schedule. The
problem involves setups, part and die set families, storage constraints, and the
possibility of downstream process starvation. Multiple heuristics are compared in
terms of solution quality and computational speed.
WC39
39-Room 100, CC
Operations Management and Marketing Interface
Cluster: Operations/Marketing Interface
Invited Session
Chair: Shuya Yin, University of California, Irvine, Merage School of
Business, Irvine, United States of America,
1 - Impact of Media Substitution and Synergy in Media Planning
Decisions for A New Product Introduction
Vahideh Abedi, Assistant Professor, California State University
Fullerton, Fullerton, CA, United States of America,
, Dmitry Krass, Oded Berman
Substitutive and synergic interactions between multiple marketing media can
significantly influence media planning strategies of firms. However, the existing
literature focuses on only one of these two types of interactions. We show that
most typically channel interactions are both substitutive and synergistic at the
same time in the context of a new product introduction. We derive several
insights on the implications of this co-existence and its influence on the firm’s
media planning decisions.
2 - Balanced or Unbalanced Market Structure? An Upstream
Supplier’s Perspective
Yuhong He, Assistant Professor, California State University,
Fullerton, Fullerton, United States of America,
, Shuya Yin, Saibal Ray
Upstream suppliers often need to decide whether or not to reply on dominant
retailers in the market place when they sell through the downstream partners.
We propose an economic model to gain some understanding of the basic trade-
offs involved in such decision making processes.
3 - Setting the Optimal Pledge and Target in
Crowdfunding Campaigns
Rachel Chen, Associate Professor,
Esther Gal-or, Paolo Roma
Crowdfunding campaigns (of consumer products) allow the entrepreneur to raise
funds from the crowd, and, if succeeded, sends a positive signal to the VC about
how the product is likely to be received by consumers. If the campaign fails,
however, the entrepreneur will have great difficulty getting funded by the VC.
This paper examines the entrepreneur’s decision in setting the pledge and the
target in crowdfunding campaigns.
4 - A Generalized Model on Forecasting Repeat Sales
Yibo Zhou, Ruixia Shi
We propose a stochastic model to forecast customers’ repeat purchasing. We
extend the traditional mixture distribution model (negative binomial distribution)
to the general situation, which fully captures customers’ heterogeneity. The
generalization is made possible through using the Gaussian quadrature. The
model retains the elegance of NBD framework and can be easily implemented.
Our results show that the proposed method outperforms the traditional forecast
methods.
WC40
40- Room 101, CC
Operations Management/Marketing Interface II
Contributed Session
Chair: Prateek Raj, PhD Student, Department of Management Science
and Innovation, UCL, Gower Street, London, WC1E 6BT,
United Kingdom,
1 - Context Dependent Preferences and Bundling Strategy
Qianbo Yin, CUHK, Room 941, CYT, CUHK, HK, HK,
Hong Kong - PRC, Sean Zhou
The bundling literature explains pure components strategy and pure bundling
strategy are optimal in perfectly and imperfectly competitive industries,
respectively. However, when consumers respond to distinct product portfolios and
exhibit context-dependent preferences, the optimal bundling strategy may
change. This paper finds this consumer behavior boosts the introduction of the
bundle and mixed bundling strategy is optimal under certain conditions.
2 - Dominant Retailer’s Strategic Response to Efficient
Fringe Retailers
Zhong Chen, PhD Student, The Chinese University of HongKong,
Room 943, Cheng Yu Tung Building,, The Chinese University of
HongKong, N.T., HongKong, Hong Kong - PRC,
Ehsan Bolandifar
Dominant retailers like Walmart has the power to negotiate their suppliers to get
more favourable contract terms while fringe retailers lack such market power.
Industry evidences indicates that fringe retailers are becoming more efficient in
their operations which puts pressure on dominant retailers to become even more
aggressive in their procurement contracts. We present a model to study strategic
response of a dominant retailer to such improvement in operational efficiency of
fringe retailers.
3 - Licensing Contracts in Conspicuous Markets
Prateek Raj, PhD Student, Department of Management Science
and Innovation, UCL, Gower Street, London, WC1E 6BT,
United Kingdom, , Kenan Arifoglu
We study licensing decision of a brand-owning firm that sells its primary product
to conspicuous customers, who value the brand exclusivity, and also licenses its
brand name to a licensing firm. We compare fixed-fee and royalty contracts, and
develop a mixed contract that improves the profit and coordinates the system.
WC41
41-Room 102A, CC
Healthcare Operations
Sponsor: Manufacturing & Service Oper
Mgmt/Healthcare Operations
Sponsored Session
Chair: Van-Anh Truong, Columbia University, 500 West 120th St, New
York, NY, 10027, United States of America,
1 - Online Advance Admission Scheduling for Services,
with Customer Preferences
Xinshang Wang, Columbia University, 500 West 120th St,
New York, NY, 10027, United States of America,
Van-Anh Truong
We study web and mobile applications that are used to schedule advance service,
from medical appointments to restaurant reservations. We give the first online,
data-driven algorithms with performance guarantees for these problems. We
show that the average performance of our algorithms is bounded by 1/2 times
that of an optimal algorithm. We test the empirical performance of our algorithms
by using data from a department within a major academic hospital system in New
York City.
2 - Service Encounters in Outpatient Clinics
Michele Samorani, Assistant Professor, University of Alberta,
3-20F Business Building,, University of Alberta, Edmonton, AB,
T6G 2R6, Canada, , Dan Zhang
The appointment scheduling literature typically focuses on “individual
appointments”which may end with a no-show, a cancellation, or a patient arrival.
However, cancellations and no-shows are often followed (possibly with some time
lag) by rebooking another individual appointment, until the patient finally sees
the doctor. We empirically study such sequences of individual appointments,
which we call service encounters, and discuss the implications of our findings on
capacity planning.
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