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The Development Of A Holistic Quality Score Using In-Situ Monitoring Of Laser Powder Bed Fusion, Ryan Daigneault
The Development Of A Holistic Quality Score Using In-Situ Monitoring Of Laser Powder Bed Fusion, Ryan Daigneault
Electronic Theses and Dissertations
Additive manufacturing processes allow for a great degree of flexibility in terms of part production. The process is autonomous once the part has started printing in that the operator generally does not need to intervene until the part is finished. One issue that this introduces, however, is an inability to determine part quality during the printing process. Once a part has started printing, the operator must either wait until the part is finished or regularly check on the part during the print to determine the part quality. Using data gathered from multiple sensors, a quality score can be used to …
On The Unique Features And Benefits Of On-Demand Distribution Models, Jennifer Pazour, Kaan Unnu
On The Unique Features And Benefits Of On-Demand Distribution Models, Jennifer Pazour, Kaan Unnu
International Material Handling Research Colloquium
Poster 6
Keynote: The Small World Of Material Handling Rearch, Parag J. Siddique, Kevin Gue, Md Salahuddin Ayuby
Keynote: The Small World Of Material Handling Rearch, Parag J. Siddique, Kevin Gue, Md Salahuddin Ayuby
International Material Handling Research Colloquium
Keynote Address
15th International Material Handling Research Colloquium Program, College Industry Council On Material Handling Education, Mhi
15th International Material Handling Research Colloquium Program, College Industry Council On Material Handling Education, Mhi
International Material Handling Research Colloquium
Official Conference Program
A Design Methodology To Optimize Supply Chain Network Performance, Dheeraporn Nippaya, J. David Porter
A Design Methodology To Optimize Supply Chain Network Performance, Dheeraporn Nippaya, J. David Porter
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Organizations are constantly looking for new ways to reduce costs while still providing high customer service levels to face stringent competitive environments and the ever- increasing market globalization. An alternative these organizations can pursue to respond to these challenges and to gain a competitive differentiation is to optimize their supply chain network (SCN). This research aims to develop an effective SCN design strategy to locate facilities (i.e., plants and distribution centers) and to balance the allocation of customers to these facilities to satisfy capacity limitations and customer demands with minimum total cost and maximum level of service. It is anticipated …
On The Unique Features And Benefits Of On-Demand Distribution Models, Jennifer A. Pazour, Kaan Unnu
On The Unique Features And Benefits Of On-Demand Distribution Models, Jennifer A. Pazour, Kaan Unnu
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
To close the gap between current distribution operations and today’s customer expectations, firms need to think differently about how resources are acquired, managed and allocated to fulfill customer requests. Rather than optimize planned resource capacity acquired through ownership or long- term partnerships, this work focuses on a specific supply-side innovation – on-demand distribution platforms. On-demand distribution systems move, store, and fulfill goods by matching autonomous suppliers' resources (warehouse space, fulfillment capacity, truck space, delivery services) to requests on-demand. On-demand warehousing systems can provide resource elasticity by allowing capacity decisions to be made at a finer granularity (at the pallet-level) and …
A Space Syntax Analysis Of The Relationship Between Function And Form In Facility Layout, Alejandro Teran-Somohano, Alice E. Smith
A Space Syntax Analysis Of The Relationship Between Function And Form In Facility Layout, Alejandro Teran-Somohano, Alice E. Smith
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
This paper explores the relationship between a facility’s operation and its form using quantitative techniques provided by Space Syntax. Space Syntax provides quantitative metrics for characterizing the spatial traits of the locations within a facility which can then be related to operational metrics. Instances of the quadratic assignment problem are used to perform spatial and operational analyses on different flow matrices to study the resulting layouts. The effects of different objective functions on facility shapes are also studied.
A Practical Collaborative Material Handling Strategy For Cross-Docks, Hector J. Carlo, Stephanie Santiago-Montano
A Practical Collaborative Material Handling Strategy For Cross-Docks, Hector J. Carlo, Stephanie Santiago-Montano
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
The current operational paradigm at less-than- truckload (LTL) cross-dock industry (i.e., dedicated strategy) is to assign one material handler (MH) per inbound trailer. As a consequence, each loaded trip performed by a MH to move a load from the assigned inbound door to the loads’ corresponding outbound door is followed by an identical empty trip to return to the inbound door. This paper introduces the monomaniacal strategy as a practical rule-based material handling collaborative strategy for LTLs designed to minimize the total empty travel. In the monomaniacal strategy, after delivering a load to an outbound door, MHs travel counterclockwise to …
Integrated Intermodal Network Design With Nonlinear Inter-Hub Movement Costs, Mohammad Ghane-Ezabadi, Hector A. Vergara
Integrated Intermodal Network Design With Nonlinear Inter-Hub Movement Costs, Mohammad Ghane-Ezabadi, Hector A. Vergara
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
In this research, transportation mode and load route selection problems are integrated with the hub location problem in a single mathematical formulation to find the optimal design of intermodal transportation networks. Economies of scale are modeled utilizing a stepwise function that relates the per container transportation cost to the amount of flow between two nodes. A heuristic method combining a genetic algorithm and the shortest path algorithm was developed to solve this integrated planning problem. Computational experiments were completed to evaluate the performance of the proposed heuristic for different problem instances. At the end, conclusions are presented and future research …
An Integrated Network Modeling Framework For Analysis Of Multi-Line Order Pick Systems, Debjit Roy, Vishal Bansal
An Integrated Network Modeling Framework For Analysis Of Multi-Line Order Pick Systems, Debjit Roy, Vishal Bansal
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Due to demanding service levels in E-commerce order fulfillment, modeling and analysis of order picking processes in warehouses deserve special attention. With a particular focus on multi-line E-commerce orders, we develop modeling tools that are necessary to analyze the order consolidation delays in the downstream pick stations. We develop a queuing network modeling framework for integrated analysis of upstream (storage system) and downstream (pick system). We apply our modeling approach to an integrated order-pick system that includes a shuttle-based storage and retrieval system, and a single pick station. Using simulations, we test the effect of the storage system configuration on …
Deployment Of An Distributed Strategic Material Flow Control For Automated Material Flow Systems Consisting Of Autonomous Modules, Christian Lieberoth-Leden, Johannes Fottner
Deployment Of An Distributed Strategic Material Flow Control For Automated Material Flow Systems Consisting Of Autonomous Modules, Christian Lieberoth-Leden, Johannes Fottner
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
The modularisation of hardware and software is one approach to handle the demand for increasing flexibility and changeability of automated material flow systems that are, for example, utilised in flexible production systems. In such automated material flow systems, autonomous modules communicate with each other to coordinate and execute transport tasks. In this paper a strategic material flow control is introduced, which is distributed on several modules realised with a multi-agent system. The strategic material flow control agent coordinates transport tasks with advanced logistical requirements, such as sequencing. A transport task states for a transport unit the system source and sink …
Shuttle-Based Storage And Retrieval Systems With Robotic Order-Picking Shuttle Carrier, Tone Lerher
Shuttle-Based Storage And Retrieval Systems With Robotic Order-Picking Shuttle Carrier, Tone Lerher
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Shuttle-based storage and retrieval systems with robotic order picking shuttle carrier are relatively new systems not yet address in automated storage system research. The objective of this research paper is to propose analytical model for robotic order picking shuttle carriers. Analytical expressions for the calculation of multi cycle have been determined by assuming uniform distributed order-picking locations and the probability theory. The proposed model enables the calculation of the expected travel (cycle) time for multiple command cycles of the robotic order picking shuttle carrier, from which the throughput performance can be evaluated.
A Framework For Modeling Material Handling With Decentralized Control, Kai Furmans, Kevin R. Gue
A Framework For Modeling Material Handling With Decentralized Control, Kai Furmans, Kevin R. Gue
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Despite decades of research in material handling, the academic community still has no accepted way of describing material handling requirements in a way that machines and algorithms can process them. Such a “way of describing” requires a language with which to describe requirements, objects, relationships between objects, and so on. We propose a modeling framework that differs from existing research in two ways: First, we address material handling modeling from the bottom up rather than from the top down, meaning we define a set of elementary functions and then combine them into processes and more complex relationships that allow us …
Urban Parcel Logistics Hub And Network Design: The Impact Of Modularity And Hyperconnectivity, Benoit Montreuil, Shannon Buckley, Louis Faugere, Reem Khir, Shahab Derhami
Urban Parcel Logistics Hub And Network Design: The Impact Of Modularity And Hyperconnectivity, Benoit Montreuil, Shannon Buckley, Louis Faugere, Reem Khir, Shahab Derhami
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
This paper examines how exploiting the hyperconnectivity and modularity concepts underpinning the Physical Internet enables the parcel logistics industry to meet the worldwide challenges to efficiently and sustainably offer faster and more precise deliveries across urban agglomerations, notably across the world’s megacities. It emphasizes disruptive transformations of package logistics hubs and networks, such as multi-tier world pixelization, multi-plane parcel logistics web, smart dynamic parcel routing and hub-based consolidation, and modular parcel containerization.
Economic And Performance Analysis Of Dual-Bay Vertical Lift Modules, Fabio Sgarbossa, Martina Calzavara, Alessandro Persona
Economic And Performance Analysis Of Dual-Bay Vertical Lift Modules, Fabio Sgarbossa, Martina Calzavara, Alessandro Persona
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Warehouse picking is one of the most time and cost consuming activities in a warehouse, often requiring the presence of human operators, who travel within the aisles to retrieve the items needed by the customers. Several studies demonstrate that the travelling activity can represent even the 50% of the total picking time, with a subsequent creation of a separate storage and picking area for small objects. In the last years, new solutions for order picking systems have been developed, especially for small items. One of these solutions requires Vertical Lift Modules (VLMs), storage columns with extractable trays. In this paper, …
Service Flow Networks For Functional Design Of Distribution Centers, Michael Schmidt, Detlef Spee, Michael Ten Hompel
Service Flow Networks For Functional Design Of Distribution Centers, Michael Schmidt, Detlef Spee, Michael Ten Hompel
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
This work deals with the determination of an approach for concept planning of distribution centers. For this purpose, the "Distribution Center Design Process" is defined. Solution concepts for logistics centers are developed and evaluated in an eight-step process. In particular, it will be focused on formalization of the functional area, which has not been considered scientifically, yet. This results, among other things, in the definition of services and basic transformation properties of handling units. These can be used to create and semantically test service flow networks, which describe the functional sequence and transformations of service objects in distribution centers.
Scalable Heuristic For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose David Porter
Scalable Heuristic For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose David Porter
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
The median problem is a type of network location problem that aims at finding a node with the total minimum demand weighted distance to a set of demand points in a weighted graph. In this research, an algorithm for solving the median problem on real road networks is proposed. The proposed algorithm, referred to as the Multi-Threaded Dijkstra’s (MTD) algorithm, is used to locate Walmart distribution centers on the 28-million node road network of the United States with the objective of minimizing the total demand weighted transportation cost. The resulting optimal location configuration of Walmart distribution centers improves the total …
Progress In Autonomous Picking As Demonstrated By The Amazon Robotic Challenge, Dominik Colling, Jonathan Dziedzitz, Kai Furmans, Patric Hopfgarten, Kai Markert
Progress In Autonomous Picking As Demonstrated By The Amazon Robotic Challenge, Dominik Colling, Jonathan Dziedzitz, Kai Furmans, Patric Hopfgarten, Kai Markert
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
The automation of the picking process is a longheld dream in intra-logistics. while the expert judgment in recent years was, that there is no immediate applicability to be expected for applications in areas, where the variety of products is high. However, the recent advances in computer science, mechanical engineering and material handling systems design have moved the field substantially forward. In this article we want to show, how the Amazon Robotic Challenge has driven this development process and how capable the technology is. The Amazon robotic Challenge (ARC) and its increasingly difficult challenges are described first. Then the applied technology …
The Small World Of Material Handling Research, Parag J. Siddique, Kevin Gue, Md Salahuddin Ayuby
The Small World Of Material Handling Research, Parag J. Siddique, Kevin Gue, Md Salahuddin Ayuby
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Using data from 88 journals over an 8 year period, we investigate the relationships among researchers in material handling. We apply social network analysis to measure many attributes of the network, including papers published each year, papers published per author, number of collaborators per author, strength of collaboration between authors, and how influential an author is in the network. We observe that collaboration patterns in material handling follow a scale-free structure in the presence of some hub-like researchers. According to social network theory, these hub researchers facilitate rapid dissemination of knowledge in the network. We conclude that the scientific community …
Contribution Of Physical Internet Containers To Mitigate The Risk Of Cargo Theft, Yanyan Yang, Eric Ballot, Miguel Gaston Cedillo-Campos
Contribution Of Physical Internet Containers To Mitigate The Risk Of Cargo Theft, Yanyan Yang, Eric Ballot, Miguel Gaston Cedillo-Campos
15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)
Different from current dedicated goods distribution solutions, the goods in the Physical Internet are encapsulated in modular dimensioned standard easy-to-interlock smart containers in an open interconnected logistic system. This paper aims to study the performance of the application of this cross-chain innovative packaging solution, especially its potential against cargo theft risks. To attain this, both qualitative and quantitative studies are carried out. With a scenario-based cost-justification model, different case studies are examined. Results suggest that through the modularity and standardization, the application of Physical Internet Containers will significantly improve the logistics performance and reduce cargo theft risks.
Optimal Supply Delivery Under Military Specific Constraints, Talena Fletcher
Optimal Supply Delivery Under Military Specific Constraints, Talena Fletcher
Electronic Theses and Dissertations
Through-out military history, the need to safely and effectively allocate resources to various military operations was a task of extreme importance. Satisfying the needs of multiple consumers by optimally pairing with appropriate suppliers falls into the category of vehicle routing problems (VRP), which has been intensively studied over the years. In general, finding the optimal solution to VRP is known to be NP-hard. The proposed solutions rely on mathematical programming and the size of the problems that can be optimally solved is typically limited. In military settings, balancing the needs of multiple consumers with the current operational environment has always …
Continuous Approximation Of Multi Cycle Time For Multi Aisles Automated Storage And Retrieval Systems., Yassine Boudghene Stambouli, Latefa Ghomri
Continuous Approximation Of Multi Cycle Time For Multi Aisles Automated Storage And Retrieval Systems., Yassine Boudghene Stambouli, Latefa Ghomri
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Knowing that, in an automated storage and retrieval system, the travel time of the storage/retrieval machine is an important parameter which affects the whole system performances, several works were dedicated to its evaluation and its modeling, in single, dual and multi command. These models were proposed for different configurations of AS/RS; such as unit load, multi-aisles and Mobile Racks. These models are based mainly on a discrete approach and the analytical expressions represent the system functioning exactly. In this paper we present a general approach for analytical modeling of multi command cycle time by giving particularly the modeling of the …
Dual-Tray Vertical Lift Modules For Fast Order Picking, Daria Battini, Martina Calzavara, Alessandro Persona, Fabio Sgarbossa
Dual-Tray Vertical Lift Modules For Fast Order Picking, Daria Battini, Martina Calzavara, Alessandro Persona, Fabio Sgarbossa
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
In the last years, new solutions for order picking systems have been developed both from industry and academics, especially for small items. They include innovative flexible automatic parts-to-picker systems and optimized picker-to-parts ones. One of these solutions consists in the use of Vertical Lift Modules (VLMs), a storage column in which small items are stored in extractable trays. In this paper, we study a new system composed by dual-tray VLMs where the operators perform picking and sorting activities. We propose several actions in order to improve the productivity of the entire system: 1) class based storage assignment of items inside …
A High-Density, Puzzle-Based System For Rail-Rail Container Transfers, Kevin Gue
A High-Density, Puzzle-Based System For Rail-Rail Container Transfers, Kevin Gue
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
We describe a high-density, puzzle-based storage and transfer system for containers in a rail-to-rail hub for the Physical Internet. The system uses a new algorithm called GridHub, which is able to transfer items in all four cardinal directions simultaneously within a grid. We show how the GridHub system might be used in a rail-rail transfer hub to transfer containers between one side of the grid and a train.
A Scalable Algorithm For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose D. Porter
A Scalable Algorithm For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose D. Porter
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
The median problem is a type of network location problem that aims at finding a node with the total minimum demand weighted distance to a set of demand nodes in a weighted graph. In this research, an algorithm for solving the median problem on real road networks is proposed. The proposed algorithm, referred to as the multi-threaded Dijkstra’s (MTD) algorithm, is then used to optimally locate Wal-Mart distribution centers on the 28-million node road network of the United States with the objective of minimizing the total demand weighted transportation cost. The resulting optimal location configuration of Wal-Mart distribution centers improves …
A Simulation Model To Evaluate The Layout For Block Stacking Warehouses, Shahab Derhami, Jeffrey S. Smith, Kevin R. Gue
A Simulation Model To Evaluate The Layout For Block Stacking Warehouses, Shahab Derhami, Jeffrey S. Smith, Kevin R. Gue
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Storing pallets of Stock Keeping Units (SKU's) on top of another in lanes on a warehouse floor is known as block stacking. This storage system is widely used in manufactoring systems and distribution centers. The arrangement of lanes in the layout of this system significantly impacts utilization of the storage space and transportation costs. Existing research that studies the layout for this system focuses exclusively on determining the optimal lane depth with respect to space utilization and ignores transportation costs. In this study, we develop a stimulation model that computes several performance metrics to evaluate both of these objectives for …
Toward An Engineering Discipline Of Warehouse Design, Leon Mcginnis, Timothy Sprock
Toward An Engineering Discipline Of Warehouse Design, Leon Mcginnis, Timothy Sprock
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Warehouses today are complex dynamic engineered systems, incorporating automation, mechanization, equipment, fixtures, computers, networks, products and people, and they can support the flow of tens or hundreds of thousands of different items to enable fulfilling thousands or tens of thousands of orders daily. In that sense, they represent a design challenge that is not terribly different from the design of other complex dynamic engineered systems, such as a modern passenger airplane, an automobile, or a unique building. What is different is that the design of these other complex dynamic engineered systems typically follows some engineering design discipline. Here, we argue …
New Design Guidelines For In-Plant Milk-Run Systems, Thorsten Schmidt, Ingolf Meinhardt, Frank Schulze
New Design Guidelines For In-Plant Milk-Run Systems, Thorsten Schmidt, Ingolf Meinhardt, Frank Schulze
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Tugger trains became a popular means of supply in material handling intensive production systems. In contrast to forklift trucks they interlink a supermarket with multiple delivery locations along a transport route in a milk-run. But the efficiency gain (higher transport capacity, reduced labor costs) has its price: Compared to forklift trucks, planning and dimensioning of in-plant milk-run systems is more complicated. The paper discusses features and drawbacks of a recent standardization approach of the Association of German Engineers (VDI) and highlights the variety of technical restrictions which have to be considered when a milkrun system is designed. It shows, that …
The Storage Replenishment Problem In Rectangular Warehouses, Haldun Sural, Claudia Archetti, Melih Celik
The Storage Replenishment Problem In Rectangular Warehouses, Haldun Sural, Claudia Archetti, Melih Celik
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
In warehouses, storage replenishment operations involve the transportation of items to capacitated item slots in forward storage area from reserve storage. These items are later picked from these slots as their demand arises. While order picking constitutes the majority of warehouse operating costs, replenishment operations might be as costly in warehouses where pick lists generally consist of only a few lines (e.g., order fulfillment warehouses). In this study, we consider the storage replenishment problem in a parallel-aisle warehouse, where replenishment and order picking operations are carried out in successive waves with time limits. The aim is to determine the item …
A Lagrangian Relaxation For Capacitated Single Allocation P-Hub Median Problem With Multiple Capacity Levels, Ching-Jung Ting, Kuo-Rui Lu
A Lagrangian Relaxation For Capacitated Single Allocation P-Hub Median Problem With Multiple Capacity Levels, Ching-Jung Ting, Kuo-Rui Lu
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
In this paper we consider a capacitated single allocation p-hub median problem with multiple capacity levels (CSApHMPMC) in which the decisions are to determine the location of p hubs and their capacity levels, the single allocation of non-hub nodes to hubs in the logistics network. This problem is formulated as an integer programming model with the objective of minimizing the sum of total transportation cost and fixed cost of the selected p hubs with established capacity levels. A Lagrangian relaxation (LR) approach is proposed to solve the CSApHMPMC. The Lagrangian function that we formulated decomposed the original problem into smaller …