Variation In Lifting Behavior During A Highly Repetitive Manual Material Task,
2014
The Ohio State University
Variation In Lifting Behavior During A Highly Repetitive Manual Material Task, Steven A. Lavender
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Presenters will provide.
Clickstream Big Data And “Delivery Before Order Making” Mode For Online Retailers,
2014
EMLYON Business School
Clickstream Big Data And “Delivery Before Order Making” Mode For Online Retailers, Yeming Yale Gong, Haoxuan Xu
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Our research is inspired by a leading online retailer using clickstream big data to estimate customer demand and then ship items to customers or hubs near customers by a mode of “delivery before order making” (DBOM) mode. Using clickstream data to obtain advance demand information in order quantities, we integrate the forecasting with a singleitem uncapacitated dynamic lot sizing problem in a rolling-horizon environment. Using the simulated clickstream data, we evaluate the performance of DBOM mode.
Comparing Industry And Academic Perspectives On Cross-Docking Operations,
2014
University of Groningen
Comparing Industry And Academic Perspectives On Cross-Docking Operations, Paul Buijs, Iris F.A. Vis
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
This paper performs a comparative analysis on the industry and academic perspectives on cross-docking operations. Detailed descriptions are provided for three typical cross-dock settings by means of case illustrations. The purpose of these descriptions is to inspire break-through innovations in future cross-docking research by identifying constraints, decision problems, and performance indicators that are thoroughly anchored in current practice.
Comparison Of Alternative Configurations For Dense Warehousing Systems,
2014
Auburn University
Comparison Of Alternative Configurations For Dense Warehousing Systems, Kevin R. Gue, G. Don Taylor
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
In heavily constrained environments requiring very high density storage, traditional aisle-based warehousing may not provide viable options. One feasible manifestation of high density storage systems is the ‘puzzle-based’ system, in which unit loads are moved through the system via manipulation of empty (escort) locations to retrieve desired items. Another option would be the use of movable concentric rings, with escorts being utilized to enable lateral movements of unit loads between the rings. In this paper, the authors present analytical results to compare retrieval time performance for these two types of high density storage systems for randomly demanded items under various …
Analysis Of Class-Based Storage Strategies For The Mobile Shelf-Based Order Pick System,
2014
Pandit Deendayal Petroleum University
Analysis Of Class-Based Storage Strategies For The Mobile Shelf-Based Order Pick System, Shobhit Nigam, Debjit Roy, Rene De Koster, Ivo J.B.F. Adan
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Mobile Shelf-based Order Pick (MSOP) systems are gaining significant in- terest for e-commerce fulfillment due to their rapid deployment capability and dynamic organization of storage pods based on item demand profiles. In this research, we model the MSOP system with class-based storage strategies and alternate pod storage policies using multi-class closed queuing networks. We observe that though closest-open location pod storage policy do not allow to efficiently use the storage spaces in comparison to random location pod storage policy in an aisle, it increases the system throughput for all item classes.
A Two-Level Stochastic Model To Estimate Vessel Throughput Time,
2014
Indian Institute of Management
A Two-Level Stochastic Model To Estimate Vessel Throughput Time, Debjit Roy, Vibhuti Dhingra, Rene De Koster
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
A good estimate of the vessel sojourn time is essential for better planning and scheduling Of container terminal resources,such as berth scheduling,quay crane(qc)assignment And scheduling,and fleet size planning. However,estimating the expected vessel so journ Time is a complex exercise because the time is dependent on several terminal operating Parameters such as the size of the vessel,the number of containers to be loaded and Unloaded,and the through put of the qcs. The through put of the qcs in turn depends On the type and number of transport vehicles,number of stack blocks,the topology of The vehicle travel path,the layout of the terminal,and …
An Empirical Study About The Effectiveness Of Lean Empowerment In Warehouses,
2014
Karlsruhe Institute of Technology
An Empirical Study About The Effectiveness Of Lean Empowerment In Warehouses, Kai Furmans, Payam Dehdari
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Lean Management is well established in production environments. Some empirical evidences are available which suggest that in production systems lean management achieves positive results. For warehousing, some works have already been done, which deal with the application and adaption of lean tools for usage in warehousing. In order to answer the question, whether the application of lean tools leads to a better performance however, no study is available today. Therefore, an empirical study has been conducted, where the effectiveness of lean empowerment has been tested and compared to the performance of warehouse, who continued to work as before.
Performance Comparison Of Various Order Picking Methods In Different Behavioral Contexts,
2014
Erasmus University of Rotterdam
Performance Comparison Of Various Order Picking Methods In Different Behavioral Contexts, Jelle De Vries, Rene De Koster, Daan Stam
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Three manual picker-to-parts order picking methods (parallel picking, zone picking, and dynamic zone picking) are employed in an experimental warehouse setup and compared in terms of productivity, quality, and job satisfaction. Participants worked in teams and were subject to either an individual- based, or a team-based incentive scheme. Furthermore, the influence of individual participants’ dominant regulatory focus (promotion or prevention) was taken into account. The outcomes show that in parallel picking an incentive system focused on individual performance is beneficial for productivity and quality compared to an incentive system focused on team performance, whereas team-based incentives are more productive in …
A Framework For The Robust Design Of Unit Load Storage Systems,
2014
Georgia Institute of Technology
A Framework For The Robust Design Of Unit Load Storage Systems, Marc Goetschalckx, Edward Huang, Pratik Mital
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
The unit load storage assignment problem determines the assignment of a set of unit loads with known arrival and departure times to a set of unit storage locations in a warehouse. The material handling device(s) can carry at most one unit load at the time. In this research it is assumed that each of the storage locations can be accessed directly without load relocations or rearrangements and that the travel times between the storage locations and from and to the warehousing docks can be computed in advance. The objective is to minimize the total travel time of the material handling …
Modeling Conveyor Merges In Zone Picking Systems,
2014
Technology and Operations Management
Modeling Conveyor Merges In Zone Picking Systems, Rene De Koster, Ivo J.B.F. Adan, Jacques Resing
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
In many order picking and sorting systems conveyors are used to transport products through the system and to merge multiple flows of products into one single flow. In practice, conveyor merges are potential points of congestion, and consequently can lead to a reduced throughput. In this paper, we study merges in a zone picking system. The performance of a zone picking system is, for a large part, determined by the performance of the merge locations. We model the system as a closed queueing network that describes the conveyor, the pick zones, and the merge locations. The resulting model does not …
A New Approach For Generating Facility Layouts Using An Algorithmic Approach,
2014
TU Dortmund University
A New Approach For Generating Facility Layouts Using An Algorithmic Approach, Volker Sadowsky, Christian Mosblech
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
In this paper a new approach is described to automatically create layouts for material flow systems. The current research in progress aiming at adopting the methods and algorithms of the Electronic Design Automation to be used in logistics planning is presented. These methods are already applied to create microchips being multiple times more complex than material flow systems while following the same goal: Functional units have to be placed on a predefined area and are linked by connections weighted differently. This basic requirement can be applied to microchip designs as well as material flow systems. The common condition is to …
Setting Cutoff Times For Picking Systems With Capacity Degradation,
2014
University of Louisville
Setting Cutoff Times For Picking Systems With Capacity Degradation, Kevin R. Gue
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
In the new landscape of e-commerce distribution, firms must offer increasingly aggressive delivery promises and then make good on them. These promises often take the form of a cutoff time, such that orders placed before the cutoff time receive premium service (next-day, same-day, etc.) and those placed afterward do not. Later cutoff times are stronger, of course, but the fulfillment system might not be able to process the order before the deadline. How late is too late? We develop a deterministic model to answer this and related questions when the order fulfillment system batches orders for efficient picking operations and …
Robust Truckload Relay Network Design Under Demand Uncertainty,
2014
Oregon State University
Robust Truckload Relay Network Design Under Demand Uncertainty, Hector A. Vergara, Zahra Mokhtari
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
This research addresses the issue of incorporating demand uncertainty in the strategic design of relay networks for truckload transportation. An existing composite variable mathematical model for the design of hybrid relay networks is extended by developing its robust counterpart. The proposed approach considers uncertainty in the number of truckloads to be dispatched between a pair of nodes in the network which is characterized by a symmetric interval around the expected demand value. A two-step heuristic approach is used to solve the robust model. Several numerical experiments are carried out to study the differences between the solutions obtained with the robust …
Experimental Validation Of Travel Time Models For Shuttle-Based Automated Storage And Retrieval System,
2014
University of Tlemcen, Algeria
Experimental Validation Of Travel Time Models For Shuttle-Based Automated Storage And Retrieval System, Zaki Sari, Latefa Ghomri, Banu Y. Ekren, Tone Lerher
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
In this paper, we aim to validate travel time models for single and dual command cycle displacements of lifts and shuttles in a shuttle-based automated storage and retrieval system (SBS/RS) by using experimental computer simulation. The models under consideration take into account acceleration and deceleration delays. We use ARENA 12 software for the simulation modeling. By simulation, we emulate the real functioning of the system. Therefore, we assume that the results from the ARENA simulation are equivalent to the onsite experimentation. Simulation results are very close to those obtained by analytical travel time models. This shows the high precision of …
Model And Algorithm For Supply Chain Analysis In Energy-Wood Industry,
2014
Technische Universität Dresden
Model And Algorithm For Supply Chain Analysis In Energy-Wood Industry, Thorsten Schmidt, Hannes Hahne
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Short rotation coppices are a renewable energy concept based on renewable raw material. This paper proposes a model and calculation method which generates valid supply chains using quantified technological and infrastructural constraints.
Integrate Vehicle Routing And Truck Sequencing In Cross-Docking Operations,
2014
Yuan-Ze University
Integrate Vehicle Routing And Truck Sequencing In Cross-Docking Operations, Ching-Jung Ting, Ting-Don Chen
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Cross-docking is a an important logistics strategy in which freight is unloaded from inbound vehicles and directly loaded into outbound vehicles, with little or no storage in between. This study considers a crossdocking system which combines the vehicle routing problem with crossdocking (VRPCD) for both inbound and outbound operations and truck sequencing problem at docks. The objective is to minimize the logistics center operation costs and transportation costs. We first formulated the integrated problem with a mixed integer programming model. Since VRPCD and sequencing problems are NP-hard, the integrated problem is also an NP-hard problem. We propose an ant colony …
The Cube Per Order Index Slotting Strategy, How Bad Can It Be?,
2014
University of Twente, Netherlands
The Cube Per Order Index Slotting Strategy, How Bad Can It Be?, Peter C. Schuur
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
A well-known and frequently applied policy to assign stock keeping units (SKUs) to (dedicated) storage locations in a warehouse is the Cube per Order Index (COI) slotting strategy. Basically, COI stores an SKU based on how frequently it is picked per unit of stock space required. Fast movers are located close to the Input-Output points. For single command order picking, COI slotting is well-known to minimize order picking travel time. For multi command this is no longer true. An interesting question is: how bad can it be? In this paper we show that there is no limit to this badness. …
Development Of A Heuristics For A Criteria Based Planning Of Pallet Storage Systems,
2014
Institute for Material Flow and Logistics
Development Of A Heuristics For A Criteria Based Planning Of Pallet Storage Systems, Detlef Spee, Michael Schmidt, Steffen Schieweck
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Reproducible and quantitative reasoning as the foundation for high-quality planning processes evolves to be key to achieve high quality of speed for logistical processes. This article strives to fulfill this demand by developing a coherent heuristics for the planning of pallet storage systems. The heuristics uses quantitative approaches provided by the available literature. In case of nonexistent sources, the missing components are developed and integrated. To be applicable in an industrial environment, the comparison and assessment of the created implementation alternatives is mainly monetary based. The heuristics follows a modular structure to achieve adaptability and extensibility. It explicitly does not …
Data Model And Software Tools For Modeling Picking Operations,
2014
Auburn University
Data Model And Software Tools For Modeling Picking Operations, Jeffrey S. Smith
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Presenter will provide.
An Analysis Of Single-Command Operations In A Mobile Rack (As/Rs) Served By A Single Order Picker,
2014
Manufactoring Engineering Laboratory of Tlemcen (MELT)
An Analysis Of Single-Command Operations In A Mobile Rack (As/Rs) Served By A Single Order Picker, Amine Hakim Guezzen, Zaki Sari
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
A Mobile rack Automated Storage and Retrieval Systems (MAS/ RS) are picker-to-stock retrieval model which are a variation of the multi aisles AS/RS. This mobile storage system is composed of racks moving laterally on rails so that one can open an aisle between any two adjacent racks, the input/output system, the storage and retrieval (S/R) machine and the computer management system or the control system. Evaluating an AS/RS could be done using several performance indicators, the two most important ones are: The utilization rate of the S/R machine and the average time necessary to serve storage or retrieval requests (the …
