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Search Publications

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Displaying 1 - 25 of 54

Physical Component Libraries for SysPhS Modeling and Simulation in Manufacturing

October 10, 2023
Author(s)
Charles Manion, Conrad Bock, Raphael Barbau
Computer-interpretable representations of system structure and behavior are at the center of developing today's complex systems. Systems engineers create and review these representations using graphical languages and information models that capture

A Methodology for Digital Twins of Product Lifecycle Supported by Digital Thread

February 8, 2023
Author(s)
Laetitia Monnier, Guodong Shao, Sebti Foufou
The technological advancement has led to the transition of manufacturing industries to Smart Manufacturing and Industry 4.0. Promising concepts such as Digital Twin and Digital Thread could help speed up the transition. One of the benefits of using digital

Verifying Executability of SysML Behavior Models Using Alloy Analyzer

February 24, 2022
Author(s)
Jeremy Doerr, Conrad Bock, Raphael Barbau
This report presents an approach to verifying executability of system behavior models by treating them as logical constraint problems solved using Alloy Analyzer, a non-proprietary software tool supporting a textual language for logical constraints and

Refocusing the Barriers to Sustainability for Small and Medium Manufacturers

February 14, 2022
Author(s)
Xavier R. Escoto, Demsas Gebrehewot, KC Morris
Sustainable manufacturing practices are a necessary component of sustainable development. Current practices in a linear economy—produce, consume, discard—will not be sufficient to sustain humanity over the long term. At the same time manufacturing is

Model of Operational Control of Discrete Event Logistics Systems (DELS)

July 8, 2021
Author(s)
Timothy A. Sprock, Conrad Bock
Operations management systems manage flows of work, resources, and information through production and logistics systems, ensuring the correct and efficient execution of requested work. These systems can leverage recent advances in data availability

Discovering Critical KPI Factors from Natural Language in Maintenance Work Orders

April 22, 2021
Author(s)
Michael Sharp, Michael Brundage, Rachael Sexton, Fnu Madhusudanan Navinchandran
Optimizing maintenance practices is a continuous process that must take into account the evolving state of the equipment, resources, workers, and more. To help streamline this process, facilities need a concise procedure for identifying critical tasks and

Realizing Environmentally-Conscious Manufacturing in the Post-COVID-19 Era

December 16, 2020
Author(s)
Nancy Diaz-Elsayed, Julius Schoop, KC Morris
The unique and unprecedented challenges of the COVID-19 pandemic have resulted in significant disruptions to diverse manufacturing supply chains across the globe. The negative economic impacts of these unexpected and rapid changes in demand and available

Modeling Hierarchical Systems with Operads

November 4, 2020
Author(s)
Spencer Breiner, Olivier Marie Rose, Blake S. Pollard, Eswaran Subrahmanian
This paper applies operads and functorial semantics to address the problem of failure diagnosis in complex systems. We start with a concrete example, developing a hierarchical interaction model for the Length Scale Interferometer, a high-precision

Industrial Wireless Deployments in the Navy Shipyard

August 30, 2020
Author(s)
Rick Candell, Karl Montgomery, Yongkang Liu, Mohamed Hany
The National Institute of Standards and Technology (NIST) and the Office of Naval Research (ONR) have partnered to investigate the application of digital manufacturing methods and technologies within the navy shipyard. As a part of the effort, wireless

A Document-based View of the Risk Management Framework

August 3, 2020
Author(s)
Joshua Lubell
Cybersecurity professionals know the Risk Management Framework as a rigorous yet flexible process for managing security risk. But the RMF lacks a document focus, even though much of the process requires authoring, reviewing, revising, and accessing plans

SysML Models for Discrete Event Logistics Systems

July 29, 2020
Author(s)
Timothy A. Sprock, Conrad E. Bock
System models and model-based engineering methods have the promise of transforming the way that industrial engineers interact with production and logistics systems. Model-based methods play a role in improving communication between stakeholders

Smart Manufacturing Testbed for the Advancement of Wireless Adoption in the Factory

July 10, 2020
Author(s)
Richard Candell, Yongkang Liu, Mohamed T. Hany, Karl R. Montgomery, Sebti Foufou
Wireless communication is a key enabling technology central to the advancement of the goals of the Industry 4.0 smart manufacturing concept. Researchers at the National Institute of Standards and Technology are constructing a testbed to aid in the adoption

Theory of Discrete Event Logistics Systems (DELS) Specification

June 12, 2020
Author(s)
Timothy A. Sprock, George Thiers, Leon F. McGinnis, Conrad E. Bock
System models and model-based engineering methods have the promise of transforming the way that industrial engineers interact with production and logistics systems. Model-based methods play a role in improving communication between stakeholders
Displaying 1 - 25 of 54