Person:

McGinnis, Leon F.

Permanent Link

https://hdl.handle.net/1853/71511

Associated Organization(s)

Organizational Unit

H. Milton Stewart School of Industrial and Systems Engineering

Organizational Unit

William M. Keck Virtual Factory Lab (VFL)

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Publication Search Results

Now showing 1 - 10 of 18

Kit Fulfillment Centers Serving Distributed Small-Series Assembly Centers in Hyperconnected Supply Chain Networks

(Georgia Institute of Technology, 2023-06) Li, Mingze ; Campos, Miguel ; Barenji, Ali ; McGinnis, Leon F. ; Montreuil, Benoit

In the context of Physical Internet (π, PI) enabled hyperconnected supply chain networks, we focus on the design and performance assessment of π-enabled kit fulfillment centers (KFCs) distributed over a territory to concurrently feed multiple agile assembly centers (AACs) in their region. The AAC production is often associated with the realization of major projects for which short product runs are needed. The KFCs are designed to produce multi-level modular container kits (Montreuil et al., 2015). The multi-level kits of the KFCs have 4 levels, task, skill, workstation, and product. The kit assembly processes are categorized into A, B, and C, according to the shape, weight, and size of their parts. The resource balancing and scheduling is done using a mixed integer programming model, whose performance is validated with a comparison experiment using synthetic data for automobile manufacturing. The process design reduces intermediate inventory space between levels of kit production to encourage space efficiency. The modular design of kitting cells enables easy and quick reconfiguration under variable demand. The multi-level modular container kits allow easy and smart transportation in the hyperconnected supply chain network and handling at AACs.
Modeling and Simulation of an Agile Assembly Center in a Physical Internet inspired Manufacturing System

(Georgia Institute of Technology, 2023-06) Campos, Miguel ; McGinnis, Leon ; Montreuil, Benoit

Globalization, high competitiveness, and highly customized products are factors that increase the complexity of product development and production systems. Such complexity makes conventional mathematical or analytical models unsuitable for properly analyzing such systems, for which simulation emerges as an alternative for evaluating, designing, improving, and operating complex systems. This Paper focuses on the design, modeling, and simulation of an agile assembly center (AAC) that produces durable big-sized products with the capacity of serving several projects and clients concurrently leveraging Physical Internet (PI) concepts while embedding the decision-making agents’ intelligence. This work is the cornerstone for implementing a digital twin of an AAC that will help make operational, tactical, and strategic decisions towards improving the performance of PI inspired assembly facilities.
Modular and Mobile Design of Hyperconnected Parcel Logistics Hub

(Georgia Institute of Technology, 2021-06) Babalou, Sevda ; Bao, Wencang ; Montreuil, Benoit ; McGinnis, Leon F. ; Buckley, Shannon ; Barenji, Ali

This paper employs modularity and mobility (M2) for designing recently introduced hyperconnected logistics hubs (HLH) for the Physical Internet, where parcels are encapsulated in modular tote-sized containers arriving in mobile racks, and these totes are consolidated by switching totes in shuffling cells to mobile racks with other totes with shared next destinations. The paper introduces the M2 framework and its modular standard-sized cells, racks and tote containers. Building on the overall HLH concept, the proposed M2 hub design is a major step forward with its on-the-fly transformability through operations to adapt to the dynamically changing sizes, mixes, characteristics, and flow of modular containers entering the hub and being consolidated and shipped within a short dwell time target. The paper uses a detailed case study to demonstrate the induced adaptability, adjustability, agility, efficiency, resilience, and scalability, and then it reports on an exploratory simulation experiment contrasting the performance of M2designs
Framework and Research Roadmap for a Next-Generation Hyperconnected Logistics Hub

(Georgia Institute of Technology, 2021-06) Montreuil, Benoit ; McGinnis, Leon F. ; Buckley, Shannon ; Babalou, Sevda ; Bao, Wencang ; Beranji, Ali

Today, parcel logistics hubs, where packages come in from many origins and are sorted to their many destinations, are both capital and labor intensive, with capacity that is largely determined by investments in conveyors. In this paper, in the context of Physical Internet growth, we propose a next-generation hyperconnected parcel hub concept that leverages parcel containerized consolidation, does not use conveyors, is robot-centric, with minimal requirement for human operators. Hub capacity can be readily adjusted to accommodate changing logistics patterns. The hub concept is described along with a demonstration case study, the fundamental hub design and operational decisions are identified, and a research roadmap is defined.
Digital Twin Design Requirements for Durable Goods Distribution in Physical Internet

(Georgia Institute of Technology, 2021-06) Campos, Miguel ; Derhami, Shahab ; McGinnis, Leon F. ; Montreuil, Benoit ; Barenji, Ali

Today the practice for distributing large products manufactured at few original equipment manufacturers (OEMs) consists of a dedicated Point-to-Point (PtP) logistics system, typically requiring long haul transport from the factory to the wholesale destination. A growing problem is the shortage of commercial drivers willing to be away from home for several days to move products cross-country. Hub relay network logistics systems are an alternative solution to P2P logistics systems that allow reducing drivers' away-from-home times. Operating a relay-based logistics system requires accounting for multiple interrelated operational decisions that become more complicated as the system becomes larger and encompasses more players. To deal with such complexity we propose utilizing a digital twin of the distribution and logistics system as a decision-making support tool to manage the system and make operational decisions efficiently. This paper explores the design and assessment of a hyperconnected relay network of transport hubs supporting the movement of durable goods from factory to wholesale destinations. It describes requirements and challenges in developing and implementing a digital twin for such systems.
From Smart Machines to Smart Supply Chains: Some Missing Pieces

( 2019-04-10) McGinnis, Leon F.

Modern warehouses, factories and supply chains are becoming enormously complex systems. Historically, the design and control of these systems has depended upon evolution and refinement over time to achieve high levels of performance. As a consequence, we do not have the legacy of engineering design that is found in digital circuits, automobiles or airplanes. But that situation is changing, albeit slowly. This talk will describe the changes that are taking place, and what they mean for our research and teaching missions.
Warehouse performance self-assessment and benchmarking

(Georgia Institute of Technology, 2009-06-18) McGinnis, Leon F.
Research Strategies: Understanding and Measuring "Performance" in the Paper Industry

(Georgia Institute of Technology, 2001-10-23) Carmichael, Carol ; Bras, Berdinus A. ; Shipley, Scott ; McGinnis, Leon F. ; Zhou, Chen ; Newcomb, P. J. ; Bargmann, Melissa Ann

From a sustainability perspective, we would define "performance" in the pulp and paper industry by the relative effectiveness of a mill or enterprise in transforming its capital resources— financial, technological, natural, and social—into value-added products and processes. Such an assessment would encompass the entire product life-cycle and its associated financial, environmental and social effects. It would extend beyond the production of a particular product to include the extraction and beneficiation of raw materials, the production processes, distribution of the product to customers, use of the product by the customers, and recycling or remanufacture of the product or its constituents into new products. The focus of our CPBIS project is narrower than the sustainability perspective, but is intended to provide a foundation for more complex assessments in the future. Our initial focus is on a particular enterprise, a manufacturing facility and its products, and the relevant measures of financial, technological and natural capital resource effectiveness. We will explore ways in which resource data (mass, energy, water, etc.) from steady-state and dynamic models of a production facility can be combined with financial data from an existing financial model used by the firm. For comparison, we will also develop an activity-based cost (ABC) model that integrates financial data with data on other resources used by the manufacturing site. Future studies will address the product life-cycle perspective on effectiveness (with respect to environmental and financial performance) and the relationship between performance measures of a facility and the enterprise. Our goal is to develop a tool to support both operational and strategic decision making by providing simultaneous views of the facility/enterprise from manufacturing process, financial, and environmental perspectives. Our partners in this project are Dr. Paul Stuart, the NSERC chair in process integration at the Ecole Polytechnique in Montreal, Quebec, Canada, his students, and the representatives from a paper mill in northern Ontario. The Ecole Polytechnique team will develop the steady-state and dynamic process models of the facility as well as provide an initial study on the existing financial model used by the firm. The CPBIS/Georgia Tech team will develop the enhanced ABC model of the facility. The Georgia Tech/Ecole Polytechnique team will explore performance metrics and other data interpretation schemes that combine financial data with material/energy data and take into consideration contextual factors associated with environmental effects.
Integrated warehouse design tools

(Georgia Institute of Technology, 1999) McGinnis, Leon F.
Product realization : an integrating theme for manufacturing education

(Georgia Institute of Technology, 1998) McGinnis, Leon F.