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Engineering On Purpose

Using SysML V2

This book is 100% completeLast updated on 2026-06-08
Richard Wallace

In a galaxy not so far, far away…

You have just received a set of requirements—or desires disguised as requirements—wild needs or want statements vaguely describing some notion of what the system should do. Now what? Where do you start with the specifications?

Rule One: Don’t Panic, and reach for Engineering on Purpose!

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About

About

About the Book

In Engineering on Purpose, you will learn that you are no longer just creating drawings or writing code; you are architecting predictability, safety, and high reliability as you navigate systems development. This book helps you make the transition from a general software or systems engineer to a mission-critical systems engineer, which requires a fundamental shift in mindset.

Engineering on Purpose is designed for junior- to midlevel engineers; this practical guide strips away dense academic theory to focus on real-world application in an informative and entertaining way. You will dive into architectural patterns, with each chapter delivering actionable methodologies to help you become a self-sufficient systems architect.

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Software Architecture

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Author

About the Author

Richard Wallace

Dr. Richard “Doc” Wallace is a veteran software and systems engineer and development manager with over forty years of experience architecting mission-critical commercial and defense technology. He was a language designer and development manager for VHDL, a member of the GPS-OCX quality assurance team, and a contributor to ground systems development for the DSP satellite program, as well as ground control systems for the MQ-1, MQ-9, and RQ-170 aircraft.

Come visit at Fuzzy Bunny Systems: www.fuzzybunnysystems.com

Contents

Table of Contents

  1. Preface
    1. What This Book Is and What It Is Not
  2. Guide to the Reader
  3. Introduction
    1. The Foundation and Process of Concept Exploration
    2. Engineering Domains
    3. SysML v2 Frameworks
    4. How to select a framework for a domain
    5. Reuse of frameworks in and across domains
      1. Utility Discussion
      2. Utility Context
    6. Where to Start
  4. Modeling Process
    1. AI use in Systems Engineering
  5. Modeling Process Step by Step
    1. But why not just design to requirements?
    2. Step 1
      1. Our Exemplar System
    3. Step 2
    4. Step 3
      1. Putting the Communications System together
    5. Step 4
      1. Everything is Software
      2. Requirement Types and Testing Types
      3. Using SysML v2 to cross the Specification/Design Boundary
      4. Details of the ELT
      5. Detailed System Block Diagram
  6. SysML v2 Specification for our Exemplar ELT
    1. SysML v2 for Design
      1. Annotations
      2. Calculation
      3. Occurrences and Actions
      4. States
      5. Cases
    2. Implementing Iteration and Detail
  7. Non-Technical Development Constraints
  8. Back to Napkins
  9. Back to Testing
  10. Template usage in Requirements
  11. Making a Model Answer Questions
  12. Controlling the Model Build
    1. Variant Selection
    2. Variants of Models without SysML v2 Variation Points
    3. Choosing Techniques for Model Building
  13. Conclusion
  14. References
  15. Appendix I Alternative Specification Notations
  16. Appendix II System Specification from Text Sources for the Mars Lander

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