2015 Informs Annual Meeting

MA68

INFORMS Philadelphia – 2015

2 - Quantifying the Impacts of City Logistics Strategies in the Mexico City Metropolitan Area Miguel Jaller, Assistant Professor, University of California, Davis, One Shields Ave, Ghausi Hall, 3143, Davis, CA, 95616, United States of America, mjaller@ucdavis.edu, Sergio Sanchez, Joanne Green This paper discusses the assessment of the potential impacts of city logistics strategies proposed for the Metropolitan Area of the Mexico City Valley: off-hour delivery programs; cargo consolidation to decrease empty trips; and preferential truck routes. The analyses consider the impacts on travel distances, travel times, accidents, emissions and health impacts under various scenarios. The paper discusses the proposed strategies, the methodology, information and the assumptions adopted. 3 - Factors Influencing the Performance of Urban Consolidation Schemes Sonke Behrends, Chalmers University of Technology, Technology Management and Economics, Logistics and Transportation, Gothenburg, Sweden, sonke.behrends@chalmers.se Many urban consolidation centers (UCC) have struggled to operate on a commercial basis and are either terminated or depend on government subsidies. Hence there is a general scepticism about their commercial viability among practitioners. This paper contributes to a better understanding under which preconditions UCCs can be feasible. This paper quantifies a UCCs impact on the key stakeholders in urban logistics and analyses the relevance of several factors for the UCC performance. 4 - Land Use Patterns, Logistics, and Emissions Erica Wygonik, RSG, 55 Railroad Row #101, White River Junction, VT, 05001, United States of America, ewygonik@gmail.com, Nathan Mayes, Anne Goodchild This work compares and contrasts two approaches to quantifying the relationships between landuse, logistics, and emissions. These two approaches are used to consider of a variety of delivery strategies, including personal travel to stores and delivery services on cost, CO2 emissions, as well as criteria pollutants. Conclusions can be drawn as to the most efficient distribution strategies under different urban forms. 5 - Economic and Environmental Comparison of Different Order Scheduling Policies Dincer Konur, Assistant Professor, Missouri University of Science and Technology, 206 EM 600 W. 14th St., Rolla, MO, 65409, United States of America, konurd@mst.edu, James Campbell This study analyzes a continuous review inventory model with multiple carriers under carbon trading regulation. We analyze and compare the optimal carrier selection and order splitting decisions with single sourcing and two alternative delivery schedules for multi-sourcing, namely, sequential ordering and sequential delivery. For each of the three order scheduling policies, a solution method is proposed and these policies are compared in terms of both economic and environmental performance. MA68 68-Room 201B, CC Electric Vehicles II Sponsor: Transportation, Science and Logistics Sponsored Session Chair: M. Hadi Amini, PhD Fellow, Carnegie Mellon University, 5700 Centre Ave, Apt 317, Pittsburgh, PA, 15206, United States of America, amini@cmu.edu 1 - Routing Aspects of Electric Vehicle Users and Their Effects on Network Performance Shubham Agrawal, Purdue University, West Lafayette, IN 47906, United States of America, shubham@purdue.edu, Amit Kumar, Srinivas Peeta, Hong Zheng This study investigates the dynamic equilibrium for mixed traffic involving Battery Electric Vehicles (BEVs) and Internal Combustion Engine Vehicles (ICEVs). The BEVs’ routing behavior with preference to minimize battery consumption and reduce range anxiety is modeled and analyzed. Due to the energy efficiency considerations in route selection for BEVs, the network performance in terms of total travel time is analyzed under different market penetrations of BEVs. 2 - A Continuum Approximation Model for Electric Vehicle Sharing Xiaopeng Li, University of South Florida, Department of Civil and Environmental Engineering, 4202 E. Fowler Avenue, Tampa, FL, 33620, United States of America, xiaopengli@usf.edu, Jiaqi Ma, Jianxun Cui, Fang Zhou, Amir Ghiasi This paper proposes a Continuum Approximation (CA) model for design of a one- way Electrical Vehicle (EV) sharing system that serves a metropolitan area. This

model determines the optimal EV sharing station locations and the corresponding EV fleet sizes to minimize the comprehensive system cost (including station construction investment, vehicle maintenance, transportation, and vehicle balancing) under stochastic and dynamic trip demands. 3 - Modeling Network Equilibrium with Mixed Flows of Electric and Gasoline Vehicles Xiaozheng He, Research Associate, Purdue University, Nextrans Center, 3000 Kent Avenue, West Lafayette, IN, 47906, United States of America, seanhe@purdue.edu, Srinivas Peeta, Hong Zheng This study develops a variational inequality formulation for the network equilibrium of mixed traffic flows consisting of electric and gasoline vehicles, where energy consumption is modeled as a function of traffic flow and considered in the drivers perceived travel cost. Numerical examples illustrate the impact of energy prices on network equilibrium and provide insights for policy-making to promote the usage of electric vehicles. 4 - On the Effect of Electric Vehicle Parking Lots’ as Dispatchable Loads on the Power System Loss M. Hadi Amini, PhD Fellow, Carnegie Mellon University, 5700 Centre Ave, Apt. 317, Pittsburgh, PA, 15206, United States of America, amini@cmu.edu, Marija D. Ilic, Orkun Karabasoglu We investigate the effect of parking lots characteristics (charging rate, capacity in terms of number of EVs, and location in the power network) on the network’s hourly loss and daily energy loss. Parking lots are modeled as EV demand aggregators. To this end, we define four scenarios to determine the effect of charging rate and distribution of EVs over the network on the system loss. We also evaluate the effect of EV parking lot’s location on the system loss. MA69 69-Room 201C, CC Facility Logistics III Sponsor: TSL/Facility Logistics Sponsored Session Chair: Pratik Parikh, Associate Professor, Wright State University, Nazanin Esmaili, PhD Candidate, University of Pittsburgh, 1048 Benedum Hall, Pittsburgh, PA, United States of America, nae22@pitt.edu, Bryan Norman, Jayant Rajgopal We propose a novel MIP approach for stocking Automated Dispensing Cabinets (ADCs) in a hospital so as to maximize savings in expected staff effort required to retrieve out-of-stock items from central storage. We investigate both position-free and grid-based position paradigms to allocate shelf space optimally under constraints designed to reduce selection errors. We also develop model enhancements to facilitate solving large real-world instances, and investigate the robustness of the results. 2 - Consideration of Product Exposure in Retail Design Corinne Mowrey, Wright State University, 3640 Colonel Glenn We discuss an approach to quantify exposure, what the customer sees; an important aspect of retail design. We consider that some locations are exposed to shoppers more frequently than others, referred to as the intensity of exposure, and explore how intensity changes with rack orientation. Accounting for bi- directional traffic flow, we explore the effect rack orientation has on exposure and investigate how optimal rack orientation for a pathway changes when the amount of directional flow varies. 3 - Covering and Connectivity Constraints in Designing a Loop Flow Pattern Ardavan Asef Vaziri, Professor, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA, 91330-8245, United States of America, ardavan.asef-vaziri@csun.edu, Gilbert Laporte The shortest loop covering the workcenters in a facility layout is an instance of the generalized traveling salesman problem. The optimal solution to this problem is a promising design for most types of conveyors and power-and-free systems where the length of the loop is the main driver of the total costs. This design further provides a promising solution to minimize the total loaded and empty flow in systems such as automatic guided vehicles. Our formulation is in the favor of this requirement. Hwy., Dayton, OH, 45435, United States of America, mowrey.4@wright.edu, Pratik Parikh, Kevin R. Gue 207 Russ, 3640 Col Glenn Hwy, Dayton, OH, 45435, United States of America, pratik.parikh@wright.edu 1 - Multiple-shelf Space Optimization in Automated Dispensing Cabinets

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