Dependency-Oriented Thinking: Volume 1 – Analysis and Design

Table of Contents

• Part I – Post-Mortem: Why Has SOA Been Such a Disappointment?
  • The View of SOA As Technology. 
  • Technology As Typhoid Mary.
  • “Service” As a Weasel Word.
• Part II – The Case for “Dependency-Oriented Thinking”.
  • What Is a “Dependency” Anyway?
  • Dependencies Impact Everything!
  • Case Studies of Dependencies in the Enterprise.
    • Business Layer Case Study 1 – The Weakest Link of a Supply Chain.
    • Business Layer Case Study 2 – Take It or Leave It: Monopsony and Choice
    • Business Layer Case Study 3 – Culture Shock.
    • Application Layer Case Study 1 – Stock-Market Crash.
    • Application Layer Case Study 2 – Speaking in Different Voices
    • Application Layer Case Study 3– Buy a Puppy, Get Two Free
    • Information Layer Case Study 1 – Locked Out: Key-Person Risk.
    • Information Layer Case Study 2 – It Goes Without Saying
    • Information Layer Case Study 3 – “ASSUME” Makes an ASS of U and ME..
    • Technology Layer Case Study 1 – The Stress and Strain of an Engineer’s Life
    • Technology Layer Case Study 2 – Paying for Trouble
    • Technology Layer Case Study 3 – What Makes a Good Technology Platform?
    • Case-Study Summary
  • Current Practice Relating to Dependencies.
    • Blindness or Wilful Blindness
    • Fooled by Subtlety – Why Surrogate Principles Don’t Work.
• Part III – Evolving a Dependency-Oriented-Design Method.
  • The BAIT Model As a Framework for Dependency-Oriented Design.
    • How to View BAIT’s Application Layer
    • How to Navigate the Layers of the BAIT Model
    • BAIT As a Model of Dependency Types
    • BAIT As a Model of “Operations”.
  • TOGAF – A Ready-Made, Comprehensive Model of the Enterprise.
    • Mining for Dependency Gems Within the TOGAF Model
    • Fundamental Enterprise Dependencies
    • Business-Layer Dependencies
    • Business-Layer Design Artefacts
    • Application-Layer Dependencies
    • Application-Layer Design Artefacts
    • Information-Layer (Data-Layer) Dependencies
    • Information-Layer Design Artefacts
    • Technology-Layer Dependencies
    • Technology-Layer Design Artefacts
  • Key Design Artefacts at a Glance.
  • Dependency-Oriented-Design Principles at a Glance.
• Part IV – Dependency-Oriented Design in Practice.
  • Approach to Design..
  • The Business Layer.
    • Key Design Artefacts
    • An Overview of Business-Layer Dependency Principles
    • Applying Dependency Principles
  • The Application Layer.
    • Key Design Artefacts
    • An Overview of Application-Layer Dependency Principles
    • Applying Dependency Principles
  • The Information Layer.
    • Key Design Artefacts
    • An Overview of Information-Layer Dependency Principles
    • Applying Dependency Principles
  • Putting the Application and Information-Layer Principles to Work..
  • The Technology Layer.
    • Key Design Artefacts
    • An Overview of Technology-Layer Dependency Principles
    • Applying Dependency Principles
  • Odds and Ends of Design..
    • “Don’t Boil the Ocean to Make a Cup of Tea”.
    • The Ecosystem of Service Providers and Service Consumers
    • Processes as Operations
    • Patterns and Qualities of Service
• Part V – Worked-Out Examples of Dependency-Oriented Thinking.
  • A Post-Mortem Using Dependency Principles.
    • The Impact of Dependencies Introduced by Implementation Design.
    • A Dependency-Aware Design.
  • Designing a Simple Orchestrated Process.
    • Analysis
  • Designing an Orchestrated Process with Workflow..
    • Analysis
  • Designing a Choreographed Process.
  • Designing Stable Interfaces in the Face of Change.
    • The Mainframe Era of the ’70s (Native Integration)
    • Standardisation of Protocols
    • The Minicomputer Era of the ’80s (the Emergence of Variants)
    • A Detour Through the Data Layer
    • Generic Interfaces
    • Routing from Abstract Interface to Concrete Implementation.
    • Type Hierarchy Added to the Data Model
    • Business Challenges of the ’90s (Process Innovation)
    • Supporting a New Variant Behind an Existing Interface
    • A New Message Data Model (But No Change to the Interface)
    • Implementation (Deployment onto Technology Components)
    • The Versioning That Wasn’t
• Summary and Conclusions.
  • Contributions of This Document.
• About the Author
• Acknowledgements.
• Appendix A – Dependency Principles at a Glance.
  • Business-Layer Principles.
  • Application-Layer Principles.
  • Information-Layer Principles.
  • Technology-Layer Principles.
• Appendix B – References.