Humanitarian Logistics – The First Week,
2012
Clemson University
Humanitarian Logistics – The First Week, Selina Begum, Bill Ferrell
12th IMHRC Proceedings (Gardanne, France – 2012)
Decisions made on material flow during the first week of a natural disaster are critical for victims. Currently, decision makers appears to be making important choices based on experience and intuition with little or no support from quantitative approaches because they do not exist. This research proposes a paradigm and offers two supporting models that will assist decision makers regarding the routing of materials during the first week of a disaster. It explicitly includes information regarding the victims’ needs and the degree to which routes are available in a quantitative way that allows updating as information improves. The paradigm involves …
A High-Density, Puzzle-Based Order Picking System,
2012
Auburn University Main Campus
A High-Density, Puzzle-Based Order Picking System, Kevin R. Gue, Onur Uludag
12th IMHRC Proceedings (Gardanne, France – 2012)
We present a new semi-automated system for carton and piece picking operations in the distribution centers. The system features decentralized control based on a message-passing protocol in which cells communicate with their neighbors to determine action in each step. The result is a dynamically changing pick face that provides high sku density and reduced worker travel. We describe an example in which pickers are 20% to 50% more productive than they would be in an equivalent ow rack system.
Using Buffers And Work-Sharing For Minimizing Makespan Of Small Batches In Assembly Lines Under Learning Effects,
2012
Tel Aviv University
Using Buffers And Work-Sharing For Minimizing Makespan Of Small Batches In Assembly Lines Under Learning Effects, Yossi Bukchin, Efrat Wexler
12th IMHRC Proceedings (Gardanne, France – 2012)
The effect of workers’ learning curve on production rate in manual assembly lines is significant when producing relatively small batches of different products. This research analyzes this effect and suggests applying work-sharing among the workers in such an environment to improve the time to complete the batch, namely, the makespan. Work-sharing refers to a situation where adjacent workers help each other in order to reduce idle times caused by blockage and starvation. The effect of work-sharing and existence of buffers on the makespan is examined and compared to a baseline situation, with no work-sharing and buffers. We present mixedinteger linear-programing …
Knowledge-Based Methods For Efficient Material Handling Equipment Development,
2012
Graz University of Technology
Knowledge-Based Methods For Efficient Material Handling Equipment Development, Dirk Jodin, Christian Landschützer
12th IMHRC Proceedings (Gardanne, France – 2012)
This paper focuses on the Knowledge-based engineering (KBE) method and general Knowledge-based technologies for automated design of material handling products. As in vehicle and aerospace engineering this is a widespread technology, the authors try to introduce the main benefits of KBE for the material handling equipment design. The benefits of KBE, as faster and more accurate (safer) product development, customized products and knowledge of employees captured within a knowledge management system, let KBE hold many promising possibilities within, to deal with nowadays demands on engineering development, driven by cost reductions and time shortcuttings. The authors introduce the actual stage of …
Understanding And Modeling Sustainability Issues In Facility Logistics,
2012
Texas A&M University
Understanding And Modeling Sustainability Issues In Facility Logistics, Brett A. Peters, Astrid Garcia Ramos
12th IMHRC Proceedings (Gardanne, France – 2012)
Environmental issues have been the focus of much discussion and debate. In light of environmental concerns, many companies have focused on creating sustainable products and systems. While there is still much disagreement about what is “sustainable,” there is a lot of on-going activity cover a wide range of areas and topics. However, relatively speaking, there is much less attention and activity within a facility logistics context. In this paper, sustainability issues related to facility logistics are explored. An overview of existing related research across a range of areas is provided. Major issues of concern for facility logistics will be discussed …
Column Generation For The Container Relocation Problem,
2012
Ecole des Mines de Saint-Etienne
Column Generation For The Container Relocation Problem, Elisabeth Zehendner, Dominique Feillet
12th IMHRC Proceedings (Gardanne, France – 2012)
Container terminals offer transfer facilities to move containers from vessels to trucks, trains and barges and vice versa. Within the terminal the container yard serves as a temporary buffer where incoming containers are piled up in stacks. Only the topmost container of each stack can be accessed. If another container has to be retrieved, containers stored above it must be relocated first. Containers need to be transported to a ship or to trucks in a predefined sequence as fast as possible. Generally, this sequence does not match the stacking order within the yard. Therefore, a sequence of retrieval and relocation …
Functional Design Of Physical Internet Facilities: A Road-Based Transit Center,
2012
University of Arkansas, Fayetteville
Functional Design Of Physical Internet Facilities: A Road-Based Transit Center, Russell D. Meller, Benoit Montreuil, Collin Thivierge, Zachary Montreuil
12th IMHRC Proceedings (Gardanne, France – 2012)
In their 2010 IMHRC paper, Montreuil, Meller and Ballot proposed a set of facility types that would be necessary to operate a Physical Internet, which they termed “π-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 road-based transit center, or road-based π- transit. The mission of a π-transit node is to enable the transfer of π - carriers from their inbound to outbound destinations. Therefore, a road based π-transit provides a mechanism to transfer π-trailers from one truck to another. The objective …
An Object Oriented And Axiomatic Theory Of Warehouse Design,
2012
Georgia Institute of Technology
An Object Oriented And Axiomatic Theory Of Warehouse Design, Leon F. Mcginnis
12th IMHRC Proceedings (Gardanne, France – 2012)
Despite the conceptual simplicity of warehousing, the development of integrated computational tools for warehouse design has remained an elusive goal. In recent years, there has been some progress toward this goal, with a growing body of research addressing topics as diverse as the design process itself, decision support for specific design decisions, warehouse representation, integrating warehouse representation and analysis, and conceptual approaches for developing integrated warehouse design tool chains. Until now, however, there has not been a suitable warehouse design theory that would provide an integrating framework for all these disparate efforts. This paper presents an object-oriented and axiomatic warehouse …
A Comparison Of Priority Rules For Non-Passing Automated Stacking Cranes,
2012
University of Puerto Rico - Mayaguez
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 …
Analysis Of Material Handling Systems Based On Discrete Time Design Modules,
2012
Karlsruhe Institute of Technology
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.
Estimating Travel Distances And Optimizing Product Placement For Dedicated Warehouses With Manual Picking,
2012
Dalhousie University
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 …
Hybrid Heuristics For Infinite Period Inventory Routing Problem,
2012
Arizona State University
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.
Open Location Management In Automated Warehousing Systems,
2012
University of Science and Technology of China
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 …
Analysis Of Parameters Influencing In-Plant Milk Run Design For Production Supply,
2012
Technische Universität München
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 …
Performance Trade-Offs In Layouts For Relief Centers,
2012
University of Wisconsin-Madison
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 …
A Multi-Objective Optimization Approach For Designing Automated Warehouses,
2012
University of Maribor, Faculty of Mechanical Engineering, Slovenia
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 …
A Mathematical Model For Driver Balance In Truckload Relay Networks,
2012
University of Arkansas, Fayetteville
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 …
Collaborative Freight Transportation To Improve Efficiency And Sustainability,
2012
Virginia Tech
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 …
Functional Design Of Physical Internet Facilities: A Road-Based Crossdocking Hub,
2012
University of Arkansas, Fayetteville
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 …
Dynamic Slotting Optimization Based On Skus Correlations In A Zone-Based Wave-Picking System,
2012
Zhejiang University of technology, Hangzhou, Zhejiang
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 …
