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Download a free sample chapter, "Chapter 3: Block Definition Diagrams," from SysML Distilled.
SysML Distilled: A Brief Guide to the Systems Modeling Language
The Systems Modeling Language (SysML) extends UML with powerful systems engineering capabilities for modeling a wider spectrum of systems and capturing all aspects of a system’s design. SysML Distilled is the first clear, concise guide for everyone who wants to start creating effective SysML models.

Drawing on his pioneering experience at Lockheed Martin and NASA, Lenny Delligatti illuminates SysML’s core components and provides practical advice to help you create good models and good designs. Delligatti begins with an easy-to-understand overview of Model-Based Systems Engineering (MBSE) and an explanation of how SysML enables effective system specification, analysis, design, optimization, verification, and validation. Next, he shows how to use all nine types of SysML diagrams, even if you have no previous experience with modeling languages. A case study running through the text demonstrates the use of SysML in modeling a complex, real-world sociotechnical system.

Modeled after Martin Fowler’s classic UML Distilled, Delligatti’s indispensable guide quickly teaches you what you need to know to get started and helps you deepen your knowledge incrementally as the need arises. Like SysML itself, the book is method independent and is designed to support whatever processes, procedures, and tools you already use.

Coverage Includes
  • Why SysML was created and the business case for using it
  • Quickly putting SysML to practical use
  • What to know before you start a SysML modeling project
  • Essential concepts that apply to all SysML diagrams
  • SysML diagram elements and relationships
  • Diagramming block definitions, internal structures, use cases, activities, interactions, state machines, constraints, requirements, and packages
  • Using allocations to define mappings among elements across a model
  • SysML notation tables, version changes, and sources for more information


About the Author
Lenny Delligatti earned his B.S. degree in Electrical and Computer Engineering from Carnegie Mellon University and his M.S. degree in Computer Science Systems Engineering from the University of Denver. He holds the OMG Certified Systems Modeling Professional (OCSMP) Model Builder: Advanced certification, the highest level of certification in SysML and Model-Based Systems Engineering (MBSE) methodology.

Lenny is the Founder and Principal Consultant at Delligatti Associates, LLC, a model-based engineering (MBE) consulting company. Prior to founding Delligatti Associates, Lenny was a Senior Systems Engineer with Lockheed Martin, creating SysML models and serving as the MBSE lead for NASA's Mission Control Center: 21st Century (MCC-21) project at Johnson Space Center in Houston, Texas.

Lenny is an active member of the Object Management Group (OMG) SysML Revision Task Force (RTF), the OMG UML RTF, and the OMG OCUP2 Certification Development Team. He serves also as the Education and Outreach Director for the Texas Gulf Coast Chapter (TGCC) of the International Council on Systems Engineering (INCOSE), supporting the professional development of the Houston-area systems engineering community.

Lenny is passionate about engineering and helping engineers develop more effective ways to perform engineering. He has created and delivered hundreds of hours of classroom and online training to hundreds of systems and software engineers on the topics of UML, SysML, and MBSE, enabling many to earn OMG certifications and lead MBSE efforts on their projects. He has delivered SysML and MBSE presentations at INCOSE meetings and at American Institute of Aeronautics and Astronautics (AIAA) Technical Symposia at Johnson Space Center.

Learn more and connect with Lenny on LinkedIn and Facebook and follow him on Twitter @LennyDelligatti. You can reach him by e-mail at