Open Access. Powered by Scholars. Published by Universities.®

Operations Research, Systems Engineering and Industrial Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

2014

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 241 - 270 of 365

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

Evaluating The Impact Of A Shared Pharmaceutical Supply Chain Model To Minimize Counterfeit Drugs, Diverted Drugs, And Drug Shortages, Jae Bong Choi Jan 2014

Evaluating The Impact Of A Shared Pharmaceutical Supply Chain Model To Minimize Counterfeit Drugs, Diverted Drugs, And Drug Shortages, Jae Bong Choi

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

The pharmaceutical supply chain in the United States of America (USA) is getting complicated and is often not controllable due to a globally open market, increasing online market, and many illegal activities. Consumers who cannot afford to buy high priced genuine products are tempted by easily accessible counterfeit drugs on illegal web site pharmacies in or out of the USA. Many corrupt participants, such as wholesalers or pharmacies in the supply chain, take advantage of weak enforcement and a flawed drug supply chain for financial gain. The public health system and numerous patients are in, or could be in, painful …

Go to article

Facility Capital Equipment And Labor Decision Support System Using A Discrete-Event Simulation And Bottleneck Detection Approach, Mohammed Almansouri Jan 2014

Facility Capital Equipment And Labor Decision Support System Using A Discrete-Event Simulation And Bottleneck Detection Approach, Mohammed Almansouri

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

Market demand is constantly changing. Therefore, it is critical for companies to be flexible and willing to adapt in order to remain competitive. This study will evaluate bottleneck detection techniques that have been identified in previous research by comparing the performance of each method on all case study models that can be replicated from the literature. The purpose of this analysis is to identify the most efficient and reliable bottleneck detection algorithm(s) which are capable of supporting constraint identification on a wide range of production system classes and configurations. The primary objective will be to identify a robust bottleneck detection …

Go to article

Interpolation-Based Super-Resolution Reconstruction: Effects Of Slice Thickness, Amir Pasha Mahmoudzadeh, Nasser H. Kashou Jan 2014

Interpolation-Based Super-Resolution Reconstruction: Effects Of Slice Thickness, Amir Pasha Mahmoudzadeh, Nasser H. Kashou

Biomedical, Industrial & Human Factors Engineering Faculty Publications

Standard clinical magnetic resonance imaging (MRI) is acquired in two-dimensions where the in-plane resolution is higher than the slice select direction. These acquisitions include axial, coronal, and sagittal planes. To date, there have been few attempts to combine the information of these three orthogonal orientations. This paper aims to take advantage of the different in-plane resolution acquired from each plane orientation and combine them into one volume in order to attain a higher resolution image. This combination of MRI data will allow the detection of smaller areas that would otherwise be missed using only one slice orientation. A comparison of …

Go to article

An Unsupervised Consensus Control Chart Pattern Recognition Framework, Siavash Haghtalab Jan 2014

An Unsupervised Consensus Control Chart Pattern Recognition Framework, Siavash Haghtalab

Electronic Theses and Dissertations

Early identification and detection of abnormal time series patterns is vital for a number of manufacturing. Slide shifts and alterations of time series patterns might be indicative of some anomaly in the production process, such as machinery malfunction. Usually due to the continuous flow of data monitoring of manufacturing processes requires automated Control Chart Pattern Recognition(CCPR) algorithms. The majority of CCPR literature consists of supervised classification algorithms. Less studies consider unsupervised versions of the problem. Despite the profound advantage of unsupervised methodology for less manual data labeling their use is limited due to the fact that their performance is not …

Go to article

Phase I Monitoring With Applications In Manufacturing And Healthcare, Smriti Neogi Jan 2014

Phase I Monitoring With Applications In Manufacturing And Healthcare, Smriti Neogi

Industrial, Manufacturing, and Systems Engineering Dissertations - Archive

This research develops statistical methods for quality monitoring in complex systems. Quality monitoring typically consists of two phases called Phase I analysis (or offline monitoring) and Phase II analysis (or online monitoring). This research is focused on Phase I monitoring. Two application areas are considered, complex manufacturing processes and healthcare delivery processes. In the first application, a robust strategy for Phase I analysis of optical profiles in low-E glass manufacturing is developed. The proposed approach aims to solve the problems such as violation of normality, high dimensionality, detection of multiple change points, etc. It will provide a convenient process monitoring …

Go to article

Study Of The Use Of A Genetic Algorithm To Improve Networked System-Of-Systems Resilience, Charles O. Adler, Cihan H. Dagli Jan 2014

Study Of The Use Of A Genetic Algorithm To Improve Networked System-Of-Systems Resilience, Charles O. Adler, Cihan H. Dagli

Engineering Management and Systems Engineering Faculty Research & Creative Works

Large scale failures or degradation resulting from smaller initial failures or disruptions in networked system-of-systems are an issue in multiple areas - for example cascading failures in electrical power grids or large disruptions in national air traffic due to local or regional weather conditions. The system architecture can have a significant impact on system-of-systems susceptibility to large scale failures. The study presented in this paper uses a simple interdependent networked system-of-systems failure model, integrated into a unique objective function that addresses both the overall level of failure and the rate of failure progression, and a genetic algorithm to demonstrate an …

Go to article

Identifying And Overcoming The Barriers To Sustainable Construction, Cristin Szydlik Jan 2014

Identifying And Overcoming The Barriers To Sustainable Construction, Cristin Szydlik

Doctoral Dissertations

"Sustainable construction has become increasingly more prevalent over the last decade. All federal and most state government buildings are mandated to achieve Leadership in Energy and Environmental Design (LEED) certification (at the silver level at a minimum). Although sustainable construction is increasingly more common, there are still barriers to the successful completion of a sustainable project, specifically with regards to projects achieving LEED certification. There are still holes in the guidance on how to successfully achieve LEED certification. Even though government agencies have mandated LEED certification, the existing barriers are preventing buildings from achieving certification, which can delay the building …

Go to article

การลดสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน, ปิยะนันท์ สยนานนท์ Jan 2014

การลดสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน, ปิยะนันท์ สยนานนท์

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้มีวัตถุประสงค์เพื่อลดปริมาณของเสียที่เกิดจากปัญหาสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน โดยการประยุกต์ใช้แนวคิด ซิกซ์ ซิกมา งานวิจัยเริ่มจากการนิยามปัญหาสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจร การวัดเพื่อกำหนดสาเหตุของปัญหาได้เลือกปัจจัยนำเข้าหลักมาพิสูจน์ความมีนัยสำคัญ การวิเคราะห์สาเหตุของปัญหาโดยการประยุกต์ใช้การออกแบบการทดลองเชิงแฟคทอเรียลแบบ 2 ระดับ (2k Factorial Design) เพื่อศึกษาอิทธิพลของปัจจัยที่มีผลต่อการทำให้เกิดของเสีย โดยพบว่ามี 3 ปัจจัยหลักที่เกี่ยวข้องกับของเสียที่เกิดขึ้น คือ ความเข้มของแสง UV ในกระบวนการถ่ายเส้นลายวงจร ความเข้มข้นของสารละลายโซเดียมไฮดรอกไซด์ และอุณหภูมิของสารละลายโซเดียมไฮดรอกไซด์ในกระบวนการลอกลายเส้นลายวงจร ซึ่งเมื่อทําการทดลองเพื่อหาระดับปัจจัย สรุปได้ว่าระดับของปัจจัยที่เหมาะสมในการลดปัญหาสิ่งแปลกปลอม คือ ความเข้มของแสง UV 50 mJ/cm2 ในกระบวนการถ่ายเส้นลายวงจร อุณหภูมิของสารละลายโซเดียมไฮดรอกไซด์ 48°C และ ความเข้มข้นของสารละลายโซเดียมไฮดรอกไซด์ 3.5%wt ในกระบวนการลอกลายเส้นลายวงจร จากนั้นจึงกำหนดแผนการควบคุมตัวแปรต่างๆ โดยจัดทำเป็นมาตรฐานวิธีการปฏิบัติงาน ผลหลังการปรับปรุงพบว่าค่าเฉลี่ยของเสียลดลงจาก 0.27% เหลือเพียง 0.004% โดยการประเมินปริมาณการผลิตคาดว่ามูลค่าความสูญเสียจะลดลงได้ถึง 336,770 บาทต่อเดือน

Go to article

Rheological Model Of Force Transmission Through The Helmet And Concussion Sensitivity, Isiah Kendall, Anthony Vicini, Tarun Goswami Jan 2014

Rheological Model Of Force Transmission Through The Helmet And Concussion Sensitivity, Isiah Kendall, Anthony Vicini, Tarun Goswami

Biomedical, Industrial & Human Factors Engineering Faculty Publications

In contact sports, head-to-head collisions can lead to concussions, which pose serious health risks to players. This research aims to understand the force transfer from the helmet to the brain that causes concussions in collisions using a rheological model. Experimental data was gathered from players in the National Football League and testing of one type of helmet and padding. The rheological model was verified with published data and good correlation was achieved. Further sensitivity analysis of concussion risk was performed with respect to force, body weight, mass, and impact duration fit to normal and Weibull distributions using Monte Carlo simulations …

Go to article

Positioning Automated Guided Vehicles In A General Guide-Path Layout, Abraham Mendoza, Jose A. Ventura Jan 2014

Positioning Automated Guided Vehicles In A General Guide-Path Layout, Abraham Mendoza, Jose A. Ventura

13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)

The locations of dwell points for idle vehicles in an automated guided vehicle (AGV) system determine the response times for pick-up requests and thus affect the performance of automated manufacturing systems. In this study, we address the problem of optimally locating dwell points for multiple AGVs in general guide-path layouts with the objective of minimizing the maximum response time in the system. We propose a mixed integer linear programming (MILP) formulation for the problem. We also develop a generic genetic algorithm (GA) to find near optimal solutions. The MILP model and GA procedure are illustrated using a two-dimensional grid layout …

Go to article

Integrating Analysis Into A Warehouse Design Workflow, Leon Mcginnis, Timothy Sprock Jan 2014

Integrating Analysis Into A Warehouse Design Workflow, Leon Mcginnis, Timothy Sprock

13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)

Supply chain analyses, including those related to material handling systems, are typically purpose-built to answer specific questions and therefore have many different implementations depending on the question, the instance data, and the solver. The purpose-built nature of these models makes it difficult to integrate them into an iterative design workflow. Despite the myriad analysis implementations, the fundamental structure of these systems and their problem domain remains unchanged, suggesting that perhaps analyses could be automatically generated on demand, given an appropriate specification of the particular system to be analyzed. We apply model-based systems engineering (MBSE) methodologies to explore this possibility in …

Go to article

Throughput Analysis Of S/R Shuttle Systems, Georg Kartnig, Jörg Oser Jan 2014

Throughput Analysis Of S/R Shuttle Systems, Georg Kartnig, Jörg Oser

13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)

Shuttle systems are used in high performance automated storage/retrieval unit load systems. Each storage level is serviced by one transfer car travelling in dual command operation. One buffer slot is located at both ends of each level. This decouples horizontal travel from vertical input/output moves, which in this case requires two independent vertical reciprocating lifts at each end of the aisle. Other systems work with only one lift used in lower throughput applications. The content of this paper is treated in the following sections starting with a problem definition and a literature survey. This is followed by a detailed functional …

Go to article

Variation In Lifting Behavior During A Highly Repetitive Manual Material Task, Steven A. Lavender Jan 2014

Variation In Lifting Behavior During A Highly Repetitive Manual Material Task, Steven A. Lavender

13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)

Presenters will provide.

Go to article

Clickstream Big Data And “Delivery Before Order Making” Mode For Online Retailers, Yeming Yale Gong, Haoxuan Xu Jan 2014

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.

Go to article

Comparing Industry And Academic Perspectives On Cross-Docking Operations, Paul Buijs, Iris F.A. Vis Jan 2014

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.

Go to article

Comparison Of Alternative Configurations For Dense Warehousing Systems, Kevin R. Gue, G. Don Taylor Jan 2014

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 …

Go to article

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 Jan 2014

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.

Go to article

A Two-Level Stochastic Model To Estimate Vessel Throughput Time, Debjit Roy, Vibhuti Dhingra, Rene De Koster Jan 2014

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 …

Go to article

An Empirical Study About The Effectiveness Of Lean Empowerment In Warehouses, Kai Furmans, Payam Dehdari Jan 2014

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.

Go to article

Performance Comparison Of Various Order Picking Methods In Different Behavioral Contexts, Jelle De Vries, Rene De Koster, Daan Stam Jan 2014

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 …

Go to article

A Framework For The Robust Design Of Unit Load Storage Systems, Marc Goetschalckx, Edward Huang, Pratik Mital Jan 2014

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 …

Go to article

Modeling Conveyor Merges In Zone Picking Systems, Rene De Koster, Ivo J.B.F. Adan, Jacques Resing Jan 2014

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 …

Go to article

A New Approach For Generating Facility Layouts Using An Algorithmic Approach, Volker Sadowsky, Christian Mosblech Jan 2014

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 …

Go to article

Setting Cutoff Times For Picking Systems With Capacity Degradation, Kevin R. Gue Jan 2014

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 …

Go to article

Robust Truckload Relay Network Design Under Demand Uncertainty, Hector A. Vergara, Zahra Mokhtari Jan 2014

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 …

Go to article

Experimental Validation Of Travel Time Models For Shuttle-Based Automated Storage And Retrieval System, Zaki Sari, Latefa Ghomri, Banu Y. Ekren, Tone Lerher Jan 2014

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 …

Go to article

Model And Algorithm For Supply Chain Analysis In Energy-Wood Industry, Thorsten Schmidt, Hannes Hahne Jan 2014

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.

Go to article

Integrate Vehicle Routing And Truck Sequencing In Cross-Docking Operations, Ching-Jung Ting, Ting-Don Chen Jan 2014

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 …

Go to article

The Cube Per Order Index Slotting Strategy, How Bad Can It Be?, Peter C. Schuur Jan 2014

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. …

Go to article

Development Of A Heuristics For A Criteria Based Planning Of Pallet Storage Systems, Detlef Spee, Michael Schmidt, Steffen Schieweck Jan 2014

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 …

Go to article

First Prev Next Last