The Incremental Architect´s Napkin
The Incremental Architect´s Napkin
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The Incremental Architect´s Napkin

This book is 100% complete

Completed on 2014-09-13

About the Book

The book compiles a number of articles from my blog "The Architect´s Napkin" into an ebook for your reading convenience. It´s a work in progress.

About the Author


Ralf Westphal is a freelance consultant, project coach, trainer, author, and speaker on software architectural topics and team organization.

He is the co-founder of the "Clean Code Developer" initiative to increase software quality.

Ralf is based in Hamburg, Germany. Visit his homepage at or contact him via the Clean Code Developer School, the home of regular in-depth inhouse training and consulting regarding sustainable software development.

Table of Contents

  • Increment #1 - Follow the money
    • Fundamental aspects of requirements
  • - Balance the forces
    • Aspects of Functionality
    • Aspects of Quality
    • Aspects of Security of Investment
  • - Make Evolvability inevitable
    • Clear expectations
    • Trust through reliability
    • Fast feedback
    • Flexibility
    • Premature completion
  • - Make increments tangible
    • Entry Points
    • Features
  • - Design functions for extensibility and readability
    • An example of functional design
    • Introducing Flow Design
    • Another example of 1D functional design
  • - Branch flows for alternative processing
    • Streams causing alternative flows
    • Branches for explicit alternative flows
    • Flow Design as language creation
    • Generalization: 2-dimensional flows
    • Similar flows flowing back together
    • Joining dissimilar flows
  • 7 - Nest flows to scale functional design
    • Integration vs operation
    • The beauty of Operations
    • The beauty of Integrations
    • Testing
    • Stratified Design
  • Appendix #1 - Why abstract functionality?

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