Operations Research, Systems Engineering and Industrial Engineering Commons^™

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, 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, 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, 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, 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?, 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, 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, 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, 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 …

Order Batching With Time Constraints In A Parallel-Aisle Warehouse: A Multiple-Policy Approach, Soondo Hong, Andrew L. Johnson, Brett A. Peters

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

A commitment of delivery time is critical in some online businesses (De Koster, 2003). An important challenge to meeting customers’ needs is timely order picking which is also relevant to worker safety, item freshness, overall operational synchronization, and reduced overtime. We analyze an order batch picking situation where a trip is constrained by vehicle capacity and must be completed within a specified time. We develop a model which partitions orders to batches to minimize the total travel time such that each trip meets the orders’ time constraints and capacity limit, and also determines a suitable operational policy for each batch. …

Designing Retail Facilities To Improve Product Exposure, Pratik J. Parikh, Corinne Mowrey

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

A retail facility should effectively engage consumers during their shopping trips if they want to convert demand into purchases. Unfortunately, the complexity of the retailing environment and lack of scientific tools often results in gut-feel approaches experimented in practice. A key factor to retail design often alluded to, but rarely analyzed, is product exposure to the travelling shopper. We define the extent of the shopper's field of vision in order to determine the actual exposure of products experienced by a traveling shopper. In so doing, we can explore the effect rack orientation has on product exposure. Our main contributions include …

Modular Design Of Physical Internet Transport, Handling And Packaging Containers, Benoit Montreuil, Eric Ballot, William Tremblay

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

This paper proposes a three‐tier characterization of Physical Internet containers into transport, handling and packaging containers. It first provides an overview of goods encapsulation in the Physical Internet and of the generic characteristics of Physical Internet containers. Then it proceeds with an analysis of the current goods encapsulation practices. This leads to the introduction of the three tiers, with explicit description and analysis of containers of each tier. The paper provides a synthesis of the proposed transformation of goods encapsulation and highlights key research and innovation opportunities and challenges for both industry and academia.

An Experimental Study Of The Impact Of Warehouse Parameters On The Design Of A Case-Picking Warehouse, Russell D. Meller, Lisa M. Thomas

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

The best design for a warehouse is based on its ability to meet the demands placed on the warehouse, which are typically characterized by warehouse parameters like the order , inventory requirements, etc. Consequently, these parameters should be considered in the design process. In this paper we characterize the design of a case-picking ware- house with design variables and identify the warehouse parameters that have the greatest impact in setting the values of these variables. With our analysis, the search for the optimal design can be reduced by limiting the design space considered.

A Frame Work And Analysis To Inform The Selection Of Piece-Level Order-Fulfillment Technologies, Jennifer A. Pazour, Russell D. Meller

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

Thepiece-levelorder-fulfillmenttechnologyselectionproblemisanimportantstrategicproblemthatsignificantlyimpactsdistributioncentercosts andoperations,andistypicallysolvedbasedonempiricalexperiences.Given ademandcurveandasuiteofavailablepiece-levelorder-fulfillmenttechnologies, weanalyzewhereinthedemandcurvedifferentorder-fulfillment technologiesshouldbeapplied. Todoso, wedevelopaframeworkthat jointlydeterminesthebestcombinationofpiece-levelorder-fulfillmenttechnologiesandtheassignmentofSKUstothesetechnologies, whichrelaxes thesequential-modelingapproachofpreviousresearch. Wevalidateour methodologywithindustrydataandshowthatour modelprovidestechnologyrecommendationsandSKUassignmentsthatareconsistent with successfulimplementations. Throughasetofnumericalexperimentsand statisticalanalysis,weidentifykeyfactorsinimplementingmanualversus automatedorder-fulfillmenttechnologiesandprovideobservationsintothe applicationofdifferentorder-fulfillmenttechnologystrategies.Finally,we presentconclusionsandfutureresearchdirections.

Optimization Of Skus' Locations In Warehouse, David Sourek, Vaclav Cempirek

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

Many companies, which deal with warehousing, optimize their warehouses. The main business of these companies is to offer to customers the warehousing services. It is possible to note that these companies are specialized in warehousing. On the other hand, we can find companies, which have as the main business the selling of goods to customers. These companies use the warehouses too but in a little bit different way. The arrangement of their warehouses can be very unsuitable and convenient for optimization. Our paper is focused on optimization of stored goods’ locations based on market basket analysis. The solution of this …

Grid Facilities Design: Dynamic Modular Deployment Of Production, Handling And Storage Resources, Suzanne Marcotte, Benoit Montreuil

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

To survive and thrive in a fast-moving environment, facilities must be designed to show adaptability, flexibility and robustness. As some facilities are depicted by heavy and sophisticated equipment costly and hard to displace, others are composed of moveable workstations with highly flexible workers. In most cases, the trade-off is between the cost of redeploying the resources and the excessive cost of material handling and storage incurred by an inefficient deployment of the resources. We propose a design strategy based on (1) conceiving and designing the facility as a stable grid of modules, (2) dynamically deploying production, storage and handling resources …

Modeling And Optimization Of Radio Frequency Identification Networks For Inventory Management, Atipong Suriya, Jose D. Porter

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

Stock loss and out-of-stocks are outcomes of poorly designed inventory management systems and can lead to significant revenue losses. Inventory management systems (IMSs) based on radio frequency identification (RFID) have the potential to minimize these losses if they are properly designed and deployed. However, the placement of RFID readers to support IMSs is often done on a trial and error basis which is time consuming and results in less than optimal coverage. A methodology to find the optimal location and number of RFID readers in a warehouse facility to ensure a desired level of radio frequency signal coverage was developed …

Real-Time Dock Door Monitoring System Using A Kinect Sensor, Hector J. Carlo, Cristina Pomales- Garcia, Yeiram Martinez

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

This study presents a proof of concept where a single Microsoft Kinect sensor is used for automated monitoring of a dock door in real-time. The proposed system will automatically and in real-time: (1) detect when an object breaches the dock door perimeter, and its corresponding speed and direction, (2) count the number of pallets loaded/unloaded to/from a trailer, (3) record the loading/unloading time of each load, and (4) reconstruct an image of every loading/unloading trip at a dock door, irrespectively of the material handling travel speed and direction. Particular emphasis is given to discussing how to extend the proposed concept …

Xqx Based Modeling For General Integer Programming Problems, Vijay P. Ramalingam

Electronic Theses and Dissertations

We present a new way to model general integer programming (IP) problems with in- equality and equality constraints using XQX. We begin with the definition of IP problems folloby their practical applications, and then present the existing XQX based models to handle such problems. We then present our XQX model for general IP problems (including binary IP) with equality and inequality constraints, and also show how this model can be applied to problems with just inequality constraints. We then present the local optima based solution procedure for our XQX model. We also present new theorems and their proofs for our …

A Decision Modeling For Phasor Measurement Unit Location Selection In Smart Grid Systems, Seung Yup Lee

Wayne State University Theses

As a key technology for enhancing the smart grid system, Phasor Measurement Unit (PMU) provides synchronized phasor measurements of voltages and currents of wide-area electric power grid. With various benefits from its application, one of the critical issues in utilizing PMUs is the optimal site selection of units.

The main aim of this research is to develop a decision support system, which can be used in resource allocation task for smart grid system analysis. As an effort to suggest a robust decision model and standardize the decision modeling process, a harmonized modeling framework, which considers operational circumstances of component, is …

Lean Fire Management: A Focused Analysis Of The Incident Command System Based On Toyota Production System Principles, Jeremiah S. Fugate

Theses and Dissertations--Mechanical and Aerospace Engineering

A primary role of the Incident Command System is to learn from past incidents, as illustrated by its origins in the wildland firefighting community. Successful emergency response operations under the Incident Command System has prompted its nationwide spread, this promulgation critically relies on the system’s capability to stabilize and continuously improve various aspects of emergency response through effective organizational learning. The objective of this study is to evaluate the potential to apply fundamental principles of the Toyota Production System (Lean manufacturing) to improve learning effectiveness within the Incident Command System. An in-depth review of literature and training documents regarding both …

Relaxation Adaptive Memory Programming For The Resource Constrained Project Scheduling Problem, Robert Christopher-Lee Riley

Electronic Theses and Dissertations

The resource constrained project scheduling problem (RCPSP) is one of the most intractable problems in operations research; it is NP-hard in the strong sense. Due to the hardness of the problem, exact solution methods can only tackle instances of relatively small size. For larger instances commonly found in real applications heuristic solution methods are necessary to find near-optimal solutions within acceptable computation time limits. In this study algorithms based on the relaxation adaptive memory programming (RAMP) method (Rego, 2005) are developed for the purpose of solving the RCPSP. The RAMP algorithms developed here combine mathematical relaxation, including Lagrangian relaxation and …

Where Are The People? The Human Viewpoint Approach For Architecting And Acquisition, Holly A. H. Handley, Beverly G. Knapp, Defense Acquisition Univ Ft Belvoir Va

Engineering Management & Systems Engineering Faculty Publications

The U.S. Department of Defense Architecture Framework (DoDAF) provides a standard framework for transforming systems concepts into a consistent set of products containing the elements and relationships required to represent a complex operational system. However, without a human perspective, the current DoDAF does not account for the human performance aspects needed to calculate the human contribution to system effectiveness and cost. The Human Viewpoint gives systems engineers additional tools to integrate human considerations into systems development by facilitating identification and collection of human-focused data. It provides a way to include Human Systems Integration (HSI) constructs into mainstream acquisition and systems …

Striping Truck Utilization Project, Jon R. Padfield, James Handy

JTRP Posters

This poster highlights research completed by the Joint Transportation Research Program (JTRP) led by Jon Padfield and James Handy, Purdue University for JTRP project SPR-3722, “Striping Truck Utilization for Crawfordsville and Greenfield District.” This poster highlights the transformation of striping trucks at both districts using Value Stream Mapping (VSM) through the Technical Assistance Program.

Prioritizing Offshore Vendor Selection Criteria For The North American Geospatial Industry, Simon Wolfgang Musaeus

Walden Dissertations and Doctoral Studies

The U.S. market for geospatial services totaled US $2.2 billion in 2010, representing 50% of the global market. Data-processing firms subcontract labor-intensive portions of data services to offshore providers in South and East Asia and Eastern Europe. In general, half of all offshore contracts fail within the first 5 years because one or more parties consider the relationship unsuccessful. Despite the high failure rates, no study has examined the offshore vendor selection process in the geospatial industry. The purpose of this study was to determine the list of key offshore vendor selection criteria and the efficacy of the analytic hierarchy …

การศึกษากลยุทธ์ทางธุรกิจของมิเตอร์อัจฉริยะ, ธนพินท์ มังคละภาณุพงศ์

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิทยานิพนธ์เล่มนี้เป็นการศึกษาแผนกลยุทธ์ทางธุรกิจของมิเตอร์อัจฉริยะ ที่ใช้ Balanced Scorecard ในการแปลงกลยุทธ์ไปสู่ภาคปฏิบัติ โดยมีวัตถุประสงค์เพื่อหาดัชนีชี้วัด (Key Performance Indicator: KPI) และ ปัจจัยหลักแห่งความสำเร็จ (Critical Success Factor: CSF) สำหรับขั้นตอนในการทำ Balanced Scorecard จะเริ่มจากการกำหนดวิสัยทัศน์ และพันธกิจ ของธุรกิจมิเตอร์อัจฉริยะ หลังจากนั้นทำการวิเคราะห์ SWOT Analysis แล้วจับคู่ให้อยู่ในรูป TOWS Matrix เพื่อหาวัตถุประสงค์และตัวชี้วัดในการจัดทำแผนที่เชิงกลยุทธ์ (Strategy Map) โดยมีกรอบการวัดและประเมินผลของธุรกิจ ผ่านมุมมองการวัดผล 4 ด้าน คือ มุมมองการเรียนรู้และการเติบโต มุมมองกระบวนการภายใน มุมมองด้านลูกค้า และมุมมองด้านการเงิน โดยมีดัชนีชี้วัดทั้งหมด 32 ตัว และมีปัจจัยหลักแห่งความสำเร็จทั้งหมด 20 ตัว ตัวอย่างเช่นดัชนีชี้วัดและปัจจัยหลักสู่ความสำเร็จของมุมมองด้านการเรียนรู้และเติบโตคือ ความปลอดภัยของพนักงาน และจำนวนครั้งของการเกิดอุบัติเหตุในสายการผลิต มุมมองด้านกระบวนการภายในคือ อัตราของเสียจากการผลิตและจำนวนของเสียที่เกิดขึ้นในสายการผลิต มุมมองด้านลูกค้า คือ อัตราการส่งคืนสินค้าและจำนวนมิเตอร์อัจฉริยะที่ถูกส่งคืน และมุมมองด้านการเงิน คือ อัตราส่วนรายได้ในส่วนของลูกค้ารายใหม่และจำนวนลูกค้ารายใหม่ที่เพิ่มขึ้น โดยขั้นตอนสุดท้ายจะเป็นการกำหนดแผนปฏิบัติการ (Action Plan) ของธุรกิจเพื่อกำหนดหน้าที่ความรับผิดชอบ ขั้นตอนในการดำเนินงาน การควบคุมและติดตามผลการดำเนินงาน ผลจากการศึกษาโดยการสำรวจความคิดเห็นจากผู้เชี่ยวชาญพบว่า แผนยุทธศาสตร์และกลยุทธ์จะใช้ได้ในช่วงการเริ่มต้นธุรกิจ โดยมีแบบแผนปฎิบัติการในการควบคุมการดำเนินงานตามตัวชี้วัดในแต่ละมุมมอง

การศึกษาปัจจัยที่ก่อให้เกิดตามดในกระบวนการหล่อฉีดแรงดันสูง, แพรวดี แก้วคงคา

Chulalongkorn University Theses and Dissertations (Chula ETD)

วัตถุประสงค์ของงานวิจัยนี้คือการศึกษาปัจจัยที่ส่งผลต่อตามดในกระบวนการหล่อฉีดแรงดันสูงอลูมิเนียม R14 สำหรับคอมเพรสเซอร์ของชิ้นส่วนยานยนต์ ที่แรงดันในการฉีด 75 ถึง 85 เมกกาปาสคาล ความเร็วในการเคลื่อนที่ของลูกสูบที่ความเร็วต่ำ 0.16 ถึง 0.30 เมตรต่อวินาที ความเร็วในการเคลื่อนที่ของลูกสูบที่ความเร็วสูง 1.8 ถึง 3.0 เมตรต่อวินาที ระยะที่ลูกสูบเคลื่อนที่ด้วยความเร็วสูง 320 ถึง 340 มิลลิเมตร และแรงดันสุญญากาศ -93.0 ถึง -100.0 กิโลปาสคาล โดยการตรวจสอบการวิเคราะห์พื้นผิวตอบสนองกับวิธีบ็อกซ์-เบหน์เคน การออกแบบเพื่อศึกษาปัจจัยและความสัมพันธ์ของพารามิเตอร์และหาสภาวะที่เหมาะสมเพื่อลดสัดส่วนตามดให้เกิดขึ้นน้อยที่สุด จากผลการทดลองพบว่าทั้ง 5 ปัจจัยมีอิทธิพลต่อการเกิดข้อบกพร่องประเภทตามดอย่างมีนัยสำคัญที่ระดับความเชื่อมั่น 95 เปอร์เซ็นต์ ส่งผลให้สัดส่วนของเสียตามดลดลงเหลือ 5.18 เปอร์เซ็นต์จากการตั้งค่าสภาวะที่เหมาะสมจากการทดลองได้แก่ แรงดันในการฉีดคือ 85 เมกกะปาสกาล การเคลื่อนที่ของลูกสูบที่ความเร็วต่ำคือ 0.30 เมตรต่อวินาที การเคลื่อนที่ของลูกสูบที่ความเร็วสูงคือ 2.49 เมตรต่อวินาที ระยะที่ลูกสูบเคลื่อนที่ด้วยความเร็วสูงคือ 326.81 มิลลิเมตร และแรงดันสุญญากาศที่ -97.28 กิโลปาสกาล

Enhancing Agility Of Supply Chains Using Stochastic, Discrete Event And Physical Simulation Models, Alok K. Verma

Engineering Technology Faculty Publications

Managing supply chains in today’s distributed manufacturing environment has become more complex. To remain competitive in today’s global marketplace, organizations must streamline their supply chains. The practice of coordinating the design, procurement, flow of goods, services, information and finances, from raw material flows to parts supplier to manufacturer to distributor to retailer and finally to consumer requires synchronized planning and execution. Efficient and effective supply chain management assists an organization in getting the right goods and services to the place needed at the right time, in the proper quantity and at acceptable cost. Managing this process involves developing and overseeing …

Human Capital Management Within The Federal Government Utilizing Generational Stratification With A Focus On Generation Y, Ian Nathaniel Barford

Engineering Management & Systems Engineering Theses & Dissertations

With many individuals in the Baby Boomer generation eligible to retire, many open positions will need to be filled by other Baby Boomers, or those from Generation X or Generation Y. Private industry has taken note of this and has been exploring workplace differences between Generation Y, Generation X, and Baby Boomers. Unfortunately for the federal government, data shows Generation Y is also separating; specifically quitting for unknown reasons. Understanding this apparent dichotomy between Generation Y and Generation X and Baby Boomer federal government employees is a current knowledge gap within the federal government's strategic human capital management focus.

From …

Testing Virtual Machines For Cadrc Server Hosting, Robin Verweij

Computer Science and Software Engineering

No abstract provided.