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Articles 811 - 840 of 1293

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

A Comparison Of Priority Rules For Non-Passing Automated Stacking Cranes, Hector J. Carlo, Azaria Del Valle-Serrano, Fernando L. Martinez-Acevado, Yaritza M. Santiago-Correa, Iris F.A. Vis Jan 2012

A Comparison Of Priority Rules For Non-Passing Automated Stacking Cranes, Hector J. Carlo, Azaria Del Valle-Serrano, Fernando L. Martinez-Acevado, Yaritza M. Santiago-Correa, Iris F.A. Vis

12th IMHRC Proceedings (Gardanne, France – 2012)

A recent trend in container ports is to operate dual non-passing Automated Storage Cranes (ASCs) that collaborate to serve storage and retrieval requests from opposite ends of a storage block. Since the ASCs are unable to pass each other, there is an exchange zone that serves as a temporary storage location so that one crane can start a request and leave it to the other crane to complete it. In this study, twelve priority rules are introduced and evaluated to determine which rule minimizes the total makespan for serving all requests, given the sequence in which each ASC will serve …

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Analysis Of Material Handling Systems Based On Discrete Time Design Modules, Furmans Kai, Ozden Eda, Stoll Judith, Epp Martin, Schmidt Thorsten, Meinhardt Ingolf, Schulze Frank Jan 2012

Analysis Of Material Handling Systems Based On Discrete Time Design Modules, Furmans Kai, Ozden Eda, Stoll Judith, Epp Martin, Schmidt Thorsten, Meinhardt Ingolf, Schulze Frank

12th IMHRC Proceedings (Gardanne, France – 2012)

In this paper, we present a method for the performance evaluation of material handling systems in an early planning stage. We are mapping typical material handling elements onto stochastic analytical models. Our intention is to build a toolbox of material handling modules that allows a fast analysis of typical continuous conveying systems. The tool should enable the identification of bottlenecks and the computation of lead time distributions for intra-logistic systems.

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Estimating Travel Distances And Optimizing Product Placement For Dedicated Warehouses With Manual Picking, Uday Venkatadri, Sachin Kubasad Jan 2012

Estimating Travel Distances And Optimizing Product Placement For Dedicated Warehouses With Manual Picking, Uday Venkatadri, Sachin Kubasad

12th IMHRC Proceedings (Gardanne, France – 2012)

This paper looks at the problem of estimating travel distances for rectangular warehouse sections with manual picking. This study was motivated by a real-life case in the food and beverage industry where case picking occurred in a rectangular section of the warehouse In particular, we are interested in estimating the distance travelled by an order picker whose picking route begins and ends at a single depot. One of the assumptions in many distance approximation papers is that any location is equally likely to be picked. However, this assumption is unrealistic in the case of dedicated warehouse layout, where products are …

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Hybrid Heuristics For Infinite Period Inventory Routing Problem, Ronald Askin, Mingjun Xia Jan 2012

Hybrid Heuristics For Infinite Period Inventory Routing Problem, Ronald Askin, Mingjun Xia

12th IMHRC Proceedings (Gardanne, France – 2012)

In this paper, we address a one-to-many distribution network inventory routing problem over an infinite planning horizon. Each retailer has an independent, random demand, and the distribution center uses capacitated vehicles for routing delivery. The demand at each retailer is relatively small compared to the vehicle capacity. A novel mathematical model is given to simultaneously decide the optimal routing tours to retailers and routing frequencies of each route. Several heuristics are developed to solve large scale instances of the problem.

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Open Location Management In Automated Warehousing Systems, Yugang Yu, René De Koster Jan 2012

Open Location Management In Automated Warehousing Systems, Yugang Yu, René De Koster

12th IMHRC Proceedings (Gardanne, France – 2012)

A warehouse needs to have sufficient open locations to be able to deal with the change of item inventory levels, but due to ongoing storage and retrieval processes, open locations usually spread over storage areas. Unfavorable positions of open locations negatively impact the average load retrieval times. This paper presents a new method to manage these open locations such that the average system travel time for processing a block of storage and retrieval jobs in an automated warehousing system is minimized. We introduce the effective storage area (ESA), a well-defined part of the locations closest to the depot; where only …

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Analysis Of Parameters Influencing In-Plant Milk Run Design For Production Supply, Eva Klenk, Stefan Galka, Willibald A. Günthner Jan 2012

Analysis Of Parameters Influencing In-Plant Milk Run Design For Production Supply, Eva Klenk, Stefan Galka, Willibald A. Günthner

12th IMHRC Proceedings (Gardanne, France – 2012)

In-plant milk-run systems are a transport concept for in-plant material delivery which is becoming more and more applicable especially in the automotive industry. This is due to the system characteristic of providing materials in small lot sizes and with high frequency. As there is a number of different milk run concepts applied and there are several parameters influencing the efficiency and stability of these systems, this paper aims at presenting an overview of common concepts and their properties together with key figures based on an empirical study. The concepts are further analyzed and evaluated with respect to resulting lead times …

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Performance Trade-Offs In Layouts For Relief Centers, Ananth Krishnamurthy, Sanket Bhat, Debjit Roy Jan 2012

Performance Trade-Offs In Layouts For Relief Centers, Ananth Krishnamurthy, Sanket Bhat, Debjit Roy

12th IMHRC Proceedings (Gardanne, France – 2012)

At a disaster affected region, relief centers distribute critical supplies and aid to the affected victims. Unlike traditional distribution centers, relief centers experience significant ‘crowd effects’ due to the sudden influx of victims in a confined space. Using knowledge from studies on pedestrian traffic flow, specialized state dependent queuing models are developed to model the flow of victims along the walkways setup at a relief center. The underlying queuing network model is analyzed to derive expressions for the average times that victims experience before they receive the service at the relief center. The research shows that crowd density effects lead …

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A Multi-Objective Optimization Approach For Designing Automated Warehouses, Tone Lerher, Matej Borovinšek, Iztok Potrč, Matjaž Šraml Jan 2012

A Multi-Objective Optimization Approach For Designing Automated Warehouses, Tone Lerher, Matej Borovinšek, Iztok Potrč, Matjaž Šraml

12th IMHRC Proceedings (Gardanne, France – 2012)

A multi objective optimization of automated warehouses is discussed and evaluated in present paper. Since most of researchers in material handling community had performed optimization of decision variables with single objective function only (usually named with minimum travel time, maximum throughput capacity, minimum cost, etc.), the multi objective optimization (travel time – cost – quality) will be presented. For the optimization of decision variables in objective functions, the method with genetic algorithms is used. To find the Pareto optimal solutions, the NSGA II genetic algorithm was used. The main objective of our contribution is to determine the performance of the …

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A Mathematical Model For Driver Balance In Truckload Relay Networks, Sarah Root, Hector A. Vergara Jan 2012

A Mathematical Model For Driver Balance In Truckload Relay Networks, Sarah Root, Hector A. Vergara

12th IMHRC Proceedings (Gardanne, France – 2012)

Driver retention has been cited as one of the primary motivating factors for the implementation of relay networks for full truckload transportation. The strategic design of such networks considering important operational factors such as limitations on load circuity and equipment balance has been previously studied in the literature, however driver scheduling has not been explicitly considered in routing decisions. We present a prescriptive modeling approach that uses mathematical programming in conjunction with a decomposition-based algorithm to select feasible duties that consider current hours-of-service regulations and assign them to drivers domiciled at relay points in the network to cover truckload demands …

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Collaborative Freight Transportation To Improve Efficiency And Sustainability, Kimberly P. Ellis, Steven Roesch, Russell D. Meller Jan 2012

Collaborative Freight Transportation To Improve Efficiency And Sustainability, Kimberly P. Ellis, Steven Roesch, Russell D. Meller

12th IMHRC Proceedings (Gardanne, France – 2012)

Collaborative distribution offers the potential for substantial improvements in freight transportation. As collaboration increases, more loads are available for sharing among transportation service providers, leading to more fully loaded trailers that travel fewer miles and reduce the cost per load on average. In this study, we develop approaches to analyze improvements in key performance measures as collaboration increases in freight transportation. For the data sets analyzed, improvements include a 34% increase in trailer fullness, a 29% reduction in average costs per load, and a 25% decrease in average miles per load. Based on this analysis, collaboration provides substantial improvements for …

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Functional Design Of Physical Internet Facilities: A Road-Based Crossdocking Hub, Russell D. Meller, Benoit Montreuil, Collin Thivierge, Zachary Montreuil Jan 2012

Functional Design Of Physical Internet Facilities: A Road-Based Crossdocking Hub, Russell D. Meller, Benoit Montreuil, Collin Thivierge, Zachary Montreuil

12th IMHRC Proceedings (Gardanne, France – 2012)

As part of the 2010 IMHRC, Montreuil, Meller and Ballot proposed a set of facility types that would be necessary to operate a Physical Internet (PI, π), which they termed nodes. This paper is part of a three-paper series for the 2012 IMHRC where the authors provide functional designs of three PI facilities. This paper covers a unimodal road-based crossdocking hub designed specifically to exploit the characteristics of Physical Internet modular containers so as to enable the efficient and sustainable transhipment of each of them from its inbound truck to its outbound truck. The objective of the paper is to …

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Dynamic Slotting Optimization Based On Skus Correlations In A Zone-Based Wave-Picking System, Li Yingde, Jeffery S. Smith Jan 2012

Dynamic Slotting Optimization Based On Skus Correlations In A Zone-Based Wave-Picking System, Li Yingde, Jeffery S. Smith

12th IMHRC Proceedings (Gardanne, France – 2012)

Many exiting slotting methods ignore the picking correlations between Stock Keeping Units (SKUs). In a previous paper, a mix integer program model for dynamic slotting to minimize the pick-wave makespan among all zones under some load balancing constraints was developed. In this paper, we develop an ant colony optimization with slot-exchange policy (ACO-SE) based on SKU correlation to assign the correlated SKUs to the adjacent slots in the same zone. The ACO-SE deposits pheromones between SKUs, uses local and global pheromone trail updates, and controls pheromone accumulation using the Max-Min rule. The main heuristic information is set to the correlation …

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An Extended Double Row Layout Problem, Chase C. Murray, Xingquan Zuo, Alice E. Smith Jan 2012

An Extended Double Row Layout Problem, Chase C. Murray, Xingquan Zuo, Alice E. Smith

12th IMHRC Proceedings (Gardanne, France – 2012)

The double row layout problem (DRLP) seeks to determine optimal machine locations on either side of an aisle, where the objective has been defined as the minimization of material ow cost among ma- chines while meeting machine clearance constraints. In this paper, we extend existing DRLP formulations in two respects. First, we consider the minimization of layout area besides the usual material ow cost objective. Second, we present a mixed integer linear programming formulation that permits non-zero aisle widths. This new formulation also includes new constraints that eliminate layout \mirroring," thus reducing the solution space significantly and thus solution times. …

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Robust Material Handling System Design Based On The Risk Versus Cost Tradeoff, Marc Goetschalckx, Edward Huang, Pratik Mital Jan 2012

Robust Material Handling System Design Based On The Risk Versus Cost Tradeoff, Marc Goetschalckx, Edward Huang, Pratik Mital

12th IMHRC Proceedings (Gardanne, France – 2012)

The design and planning of major material handling systems belongs to the class of systems design problems under uncertainty. The overall structure of the system is decided during the current design stage, while the values of the future conditions and the future planning decisions are not known with certainty. Typically the future uncertainty is modeled through a number of scenarios and each scenario has an individual timediscounted total system cost. The overall performance of the material handling system is characterized by the distribution of these scenario costs. The central tendency of the cost distribution is almost always computed as the …

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Toward Sustainability, High Density And Short Response Time By Live-Cube Storage Systems, Nima Zaerpour, Yugang Yu, René De Koster Jan 2012

Toward Sustainability, High Density And Short Response Time By Live-Cube Storage Systems, Nima Zaerpour, Yugang Yu, René De Koster

12th IMHRC Proceedings (Gardanne, France – 2012)

This paper studies random storage in a live-cube storage system where loads are stored multi-deep. Although such storage systems are still rare, they are increasingly used, for example in automated car parking systems. Each load is accessible individually and can be moved to a lift on every level of the system in x- and y-directions by a shuttle as long as an open slot is available next to it, comparable to Sam Loyd’s sliding puzzles. A lift moves the loads across different levels in z-direction. We derive the expected travel time of a random load from its storage location to …

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Process Analysis For Material Flow Systems, Thorsten Schmidt, David Wustmann, Robert Schmaler Jan 2012

Process Analysis For Material Flow Systems, Thorsten Schmidt, David Wustmann, Robert Schmaler

12th IMHRC Proceedings (Gardanne, France – 2012)

This paper describes a generic approach for analysis of internal behavior of logistic systems based on event logs. The approach is demonstrated by an example of event data from the simulation model of an automated material handling system (MHS) in a manufacturing company. The purpose of the analysis is the identification of design and operation problems and their causes, prospectively. As a result, the simulation model developer obtains the condensed and ranked information on events. These events describe the internal system behavior with anomalies pointing at either possible problems or capacity reserves.

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A Study On Storage Allocation In An Automated Semiconductor Manufacturing Facility, St´Ephane Dauz`Ere-P´Er`Es, Claude Yugma, Ahmed Ben Chaabane, Ahmed Ben Chaabane, Lionel Rulli`Ere, Gilles Lamiable Jan 2012

A Study On Storage Allocation In An Automated Semiconductor Manufacturing Facility, St´Ephane Dauz`Ere-P´Er`Es, Claude Yugma, Ahmed Ben Chaabane, Ahmed Ben Chaabane, Lionel Rulli`Ere, Gilles Lamiable

12th IMHRC Proceedings (Gardanne, France – 2012)

This paper deals with the allocation of storage capacity in the automated material handling environment of a semiconductor wafer manufacturing facility. The impact of the allocation of stokers to machines in semiconductor fabrication facilities (fabs) is very little studied, although it significantly impacts the efficiency of the Automated Material Handling System (AMHS). After motivating and describing the problem of allocating unitary stokers to machines, a first local approach is discussed. We then propose a Mixed Integer linear Programming model to solve the global problem with two objectives: Minimizing the total maximum travel distance of vehicles and balancing the utilization of …

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Design & Modeling Of A Single Machine Flow Rack As/Rs, Zaki Sari, Nadir Hakim Bessenouci Jan 2012

Design & Modeling Of A Single Machine Flow Rack As/Rs, Zaki Sari, Nadir Hakim Bessenouci

12th IMHRC Proceedings (Gardanne, France – 2012)

In this paper, we aim to introduce a new variation of the flow rack automated storage and retrieval system (AS/RS) using a single machine for storage and retrieval operations instead of two machines. Also, analytical expressions are derived for expected single and dual cycle times of the storage and retrieval machine. For that, randomized storage assignment, and Tchebychev travel are assumed. Two dwell point positions are investigated and compared to determine the best one. Finally an experimental validation using simulation is conducted to verify the quality of the developed.

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An Mip Approach To The U-Line Balancing Problem With Proportional Worker Throughput, Reyhan Erin, Andres L. Carrano, Moises Sudit Jan 2012

An Mip Approach To The U-Line Balancing Problem With Proportional Worker Throughput, Reyhan Erin, Andres L. Carrano, Moises Sudit

12th IMHRC Proceedings (Gardanne, France – 2012)

One of the major challenges faced by manufacturing companies is to remain competitive in dynamic environments, where fluctuations in customer demand and production rates require systems capable of adapting in a practical and economical way. A U-shaped production cell is considered one of the most flexible designs for adapting the workforce level to varying conditions. However, re-balancing efforts are time consuming and often require a new work allocation and line design. In this paper, a two-stage MIP model to determine the best cell design under varying workforce levels is proposed. The model seeks to maintain proportionality between throughput and the …

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A Yard Crane Scheduling Problem With Practical Constraints, Amin Hossein Gharehgozli, Yugang Yu, Rene De Koster, Gilbert Laporte Jan 2012

A Yard Crane Scheduling Problem With Practical Constraints, Amin Hossein Gharehgozli, Yugang Yu, Rene De Koster, Gilbert Laporte

12th IMHRC Proceedings (Gardanne, France – 2012)

The problem considered in this paper is to locate storage containers while a set of container storage and retrieval requests are sequenced. Two automated cranes stack and retrieve containers in a single block of a yard. The cranes cannot pass each other and must be separated by a safety distance. Storage containers are initially located at the seaside and land side input/output (I/O) points of the block. Each must be stacked in a specific location of the block, selected from a set of open locations suitable for stacking the storage container. Retrieval containers are initially located in the block and …

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Modeling The Inventory Requirement And Throughput Performance Of Picking Machine Order-Fulfillment Technology, Jennifer A. Pazour, Russell D. Meller Jan 2012

Modeling The Inventory Requirement And Throughput Performance Of Picking Machine Order-Fulfillment Technology, Jennifer A. Pazour, Russell D. Meller

12th IMHRC Proceedings (Gardanne, France – 2012)

Picking machines, also known as remote-order-picking systems, are an example of a stock-to-picker piece-level order-fulfillment technology that consists of two or more pick stations and a common storage area. An integrated closed-loop conveyor decouples the pick stations from the storage area by transporting the needed totes to and from the storage area and the pick stations. We develop a probabilistic model capable of quantifying the inventory differences between order-fulfillment technologies that pool inventory with technologies that do not pool inventory. To determine the throughput of a picking machine, we develop a methodology that incorporates existing analytical models for the picking …

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An Unstable Balance: Exploration, Exploitation, And Innovation Decline During Development, Craig Randall Jan 2012

An Unstable Balance: Exploration, Exploitation, And Innovation Decline During Development, Craig Randall

2012

he ability to innovate is considered central to firm performance and the consensus is that firms should balance exploration and exploitation innovation to succeed. Studies using an exploration/exploitation perspective have gained increasing interest, and have generally concluded that exploration innovation rates are too low. Researchers have concentrated on the early aspects of the innovation planning process: the Search, Portfolio Selection, and Design Phase, and have also studied the benefits of pursuing a serial or parallel pursuit of exploration and exploitation. Largely missing from exploration/exploitation innovation literature, however, is the development phase—which is among the longest and resource intensive phases of …

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Identification And Implementation Of Patterns Towards A Model Of Environmental Sustainability, S. Jimmy Gandhi, Santiago Perez, Danial Rushton, Robert Cloutier, Ipek Bozkurt, C. Ariel Pinto Jan 2012

Identification And Implementation Of Patterns Towards A Model Of Environmental Sustainability, S. Jimmy Gandhi, Santiago Perez, Danial Rushton, Robert Cloutier, Ipek Bozkurt, C. Ariel Pinto

Engineering Management & Systems Engineering Faculty Publications

Much like the Quality Revolution did in the 1980's, corporate sustainability has the potential to drive significant changes in the processes and structure of various organizations in the coming decade. With a rapidly growing global population and an ever increasing global demand for resources (Population-Resource-Center, 2012). Sustainability has emerged as one of the primary challenges that organizations will have to deal with in the 21st century. An increasing realization among business executives that profitability by itself is not enough as a measure of success is also driving the increased adoption of sustainable practices in the corporate world (Lowitt and Grimsley, …

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Agile Knowledge Management: A Review, Reconceptualization, And Extension To Military Applications, Dogan Ozturk, Rafael E. Landaeta, Resit Unal, Cesar Ariel Pinto, Gokay Sursal Jan 2012

Agile Knowledge Management: A Review, Reconceptualization, And Extension To Military Applications, Dogan Ozturk, Rafael E. Landaeta, Resit Unal, Cesar Ariel Pinto, Gokay Sursal

Engineering Management & Systems Engineering Faculty Publications

This study contributes to the literature by integrating agility in knowledge management (KM) operations, especially in military environments via major findings of (a) introducing a new approach to KM with integration of 'agility'; (b) articulating the application of an enhanced process of Agile Knowledge Management (AKM) across the military. The purpose of the study is to explore the conceptual background of agility in KM, re-conceptualize it and extend it to military applications with a special focus on counterinsurgency (COIN). An initial qualitative exploration of agility in KM was performed. Three different concepts and their interrelationships were analyzed: (a) KM, (b) …

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Securing Access To Lower-Cost Talent Globally: The Dynamics Of Active Embedding And Field Structuration, Stephan Manning, Joerg Sydow, Arnold Windeler Jan 2012

Securing Access To Lower-Cost Talent Globally: The Dynamics Of Active Embedding And Field Structuration, Stephan Manning, Joerg Sydow, Arnold Windeler

Management and Marketing Faculty Publication Series

This article examines how multinational corporations (MNCs) shape institutional conditions in emerging economies to secure access to high-skilled, yet lower-cost science and engineering talent. Based on two in-depth case studies of engineering offshoring projects of German automotive suppliers in Romania and China we analyze how MNCs engage in ‘active embedding’ by aligning local institutional conditions with global offshoring strategies and operational needs. MNCs thereby contribute to the structuration of field relations and practices of sourcing knowledge-intensive work from globally dispersed locations.Our findings stress the importance of institutional processes across geographic boundaries that regulate and get shaped by MNC activities.

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Go Niche Or Go Home: Influence Maximization In The Presence Of Strong Opponent, Long Foong Liow Jan 2012

Go Niche Or Go Home: Influence Maximization In The Presence Of Strong Opponent, Long Foong Liow

Dissertations and Theses Collection (Open Access)

In hotly contested product categories dominated by a few powerful firms, it is quite common for weaker or late entrants to focus only on particular segments of the whole market. The rationale for such strategy is intuitive: to avoid direct confrontation with heavy-weight firms, and to concentrate in segments where these weaker firms have comparative advantages. In marketing, this is what people called “go niche or go home”. The niche-building strategy may rely on “homophily”, which implies that consumers in a particular market segment might possess certain set of attributes that cause them to appreciate certain products better (in other …

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Dock Assignment And Truck Scheduling Problems At Cross-Docking Terminals, Ching-Jung Ting, Amanda G. Rodríguez López Jan 2012

Dock Assignment And Truck Scheduling Problems At Cross-Docking Terminals, Ching-Jung Ting, Amanda G. Rodríguez López

12th IMHRC Proceedings (Gardanne, France – 2012)

In this paper, we consider the integration of dock assignment and truck scheduling problem at cross-docking terminals. The problem is first formulated as a 0-1 integer programming model. Since both dock assignment and truck scheduling problems are NP-hard, its integration is more difficult to solve. Thus we propose reduced variable neighborhood search (RVNS) algorithms to solve the problem. Computational experiments are carried out on four set of instances. The results show that RVNS is capable of finding good solutions in a much shorter computation time when it is compared with optimization solver Gurobi’s solutions.

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System Of Systems Perspective On Risk: Towards A Unified Concept, C. Ariel Pinto, Michael K. Mcshane, Ipek Bozkurt Jan 2012

System Of Systems Perspective On Risk: Towards A Unified Concept, C. Ariel Pinto, Michael K. Mcshane, Ipek Bozkurt

Finance Faculty Publications

Many systems and projects that concern systems engineers, engineering managers, and business managers today can be defined as system of systems (SoS), which are described as ambiguous, uncertain and dynamic, among others. In addition to the traditional view on risk identification, analysis and management, the concept of risk should be considered with respect to these systems of systems. The purpose of this paper is to analyse both fundamental concepts and recent publications in system of systems, business and engineering management, as well as risk analysis, modelling, and management for the purpose of better describing the concept of risk with respect …

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Multi-Party Multi-Period Supply Chain Coordination, Thin Yin Leong, Michelle Lee Fong Cheong Jan 2012

Multi-Party Multi-Period Supply Chain Coordination, Thin Yin Leong, Michelle Lee Fong Cheong

Research Collection School Of Computing and Information Systems

We apply combinatorial auction as a coordination mechanism to smooth demands placed on suppliers' limited production capacities, allowing several manufacturers to share common suppliers effectively. Products are bidders bidding for parts from suppliers, consuming their capacities in different time periods. The fourth party logistic (4PL) provider acts as the auctioneer to coordinate bids and perform price iterations. We leverage on the strong links between the Lagrangian relaxation method and combinatorial auction, where the Lagrange multipliers serve as the supply capacity reserve prices, to balance the demand and supply of capacities. To prevent cyclic behaviour and to increase convergence speed, we …

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A Sentiment Analysis Of Singapore Presidential Election 2011 Using Twitter Data With Census Correction, Murphy Junyu Choy, Michelle Lee Fong Cheong, Nang Laik Ma, Ping Shung Koo Jan 2012

A Sentiment Analysis Of Singapore Presidential Election 2011 Using Twitter Data With Census Correction, Murphy Junyu Choy, Michelle Lee Fong Cheong, Nang Laik Ma, Ping Shung Koo

Research Collection School Of Computing and Information Systems

Sentiment analysis is a new area in text analytics where it focuses on the analysis and understanding of the human emotions from the text patterns. This new form of analysis has been widely adopted in customer relationship management especially in the context of complaint management. However, sentiment analysis using Twitter data has remained extremely difficult to manage due to sampling biasness. In this paper, we will discuss about the application of reweighting techniques in conjunction with online sentiment divisions to predict the vote percentage that individual presidential candidate in Singapore will receive in the Presidential Election 2011. There will be …

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