Crafting Non-Functional Requirements
Crafting Non-Functional Requirements
About the Book
This book is for anyone who’s ever been caught nodding along in meetings where the words "scalability" and "fault tolerance" were thrown around like confetti but secretly had no idea what was going on. Whether you're an Solution Architect or System Designer or Software Developer or just the person who gets asked to "optimize" things without a clear explanation (spoiler: that’s still IT), this book has something for you.
If you're responsible for delivering strategic, tactical, or operational engagements for Fortune 100 companies, or if you're just trying to survive your weekly team sync without getting voluntold for something, this book is your new best friend.
Non-functional requirements (NFRs)—those sneaky, often-overlooked keys to any successful software or IT program—are finally getting the attention they deserve. Because let’s face it, ignoring them is like planning a road trip but forgetting to check if the car has gas. You might get out of the driveway, but good luck making it to your destination.
Whether you're crafting bespoke solutions in Java, .NET, or wrangling COTS applications, this book will help you tackle the wild world of NFRs without losing your sanity. You'll find a framework (yes, another one) for capturing NFRs that you can actually use, instead of just pretending to understand.
In short, if you’re in the business of making sure software works, stays up, stays fast, and doesn’t implode under pressure, this book is for you. And if you're here just for the pizza and post-deployment party, don’t worry—we cover that too (at least metaphorically).
About the Author
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Table of Contents
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Why NFRs Are Essential in Modern Systems
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Real-World Consequences of Neglecting NFRs
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Key Non-Functional Requirements (NFRs)
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Common Misconceptions About NFRs
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NFRs and Business Value
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Elements to Crafting Effective NFRs
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Conclusion
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Introduction
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Imperative of Quality Requirements in Architectural Design
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NFR Software Development Life Cycle
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Repercussions of Neglecting Quality Goals
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Analytical Modelling for NFRs: Predicting System Behaviour
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Conclusion and Key Takeaways
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Introduction to High-Performance System Design
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High Performance NFRs and Key Performance Indicators (KPIs)
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Modelling High-Performance System Requirements
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Solution Options for High Performance Systems
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High-Performance Design Patterns
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Gen AI in High Performance Systems
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Conclusion: Foundations of High-Performance System Design
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Introduction: The Imperative of High Performance in Modern Systems
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Interplay Key Software Quality Attributes
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Evaluating Trade-offs in High-Performance System Design: A Methodical Approach
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Anti-Patterns Impacting High Performance
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Pitfalls in Designing High Performance Systems
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Conclusion: Navigating the Landscape of High-Performance System Design
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Introduction: The Criticality of High Availability in Contemporary Systems
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Key Performance Indicators - KPIs for Highly Available Systems
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Modelling High Availability: Non-Functional Requirements (NFRs)
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Solution Options for High Availability Systems
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High Availability Design Patterns
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Gen AI in High Availability Systems
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Conclusion
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Introduction: The Imperative of High Availability in Modern Systems
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Interplay of HA with Key Software Quality Attributes
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Methodologies for Evaluating and Making Informed Trade-offs in High Availability System Design
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Anti-Patterns Impacting High Availability
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Pitfalls in Designing High Availability Systems
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Conclusion: Navigating the Landscape of High Availability System Design
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Introduction: The Imperative of Scalability in Modern Systems
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Key Performance Indicators (KPIs) for Scalable Systems
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Modelling Scalability Non-Functional Requirements (NFRs)
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Solution Options for High Scalability Systems 112
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High Scalability Design Patterns: Building Resilient and Adaptable Systems
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Gen AI in High Scalability Systems
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Conclusion
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Introduction: The Imperative of Scalability in Modern Systems
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Interplay with Other System Attributes
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Methodologies for Evaluating and Making Trade-offs in Scalable System Design
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Anti-Patterns Impacting Scalability
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Pitfalls in Designing Scalable Systems
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Conclusion: Navigating the Landscape of Scalable System Design
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Introduction: The Imperative of Security in Modern Systems
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Key Performance Indicators (KPIs) for Highly Secure Systems
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Modelling Security Non-Functional Requirements (NFRs)
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Solution Options for High Security Systems
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Design Patterns for Security
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Gen AI in High Security Systems
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Conclusion: Laying the Foundations for Highly Secure Systems
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Introduction: The Imperative of Secured Modern Systems
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Interplay and Interdependency of Security with Key Software Quality Attributes
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Methodologies for Evaluating & Making Trade-offs in Secure System Design
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Anti-Patterns Impacting Security
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Pitfalls in Designing Highly Secure Systems
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Conclusion: Navigating the Landscape of Highly Secure System Design
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Introduction: The Imperative of Maintainability in Modern Systems
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Key Performance Indicators (KPIs) for Maintainable Systems
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Modelling Maintainability Non-Functional Requirements (NFRs)
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Solution Options for Highly Maintainable Systems
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Design Patterns for Maintainable Systems
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Gen AI in High Maintainability Systems
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Conclusion
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Introduction: The Imperative of Maintainability in Modern Systems
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Interplay with Other System Attributes
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Interplay of Maintainability with other System Attributes
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Methodologies for Evaluating Maintainable System Design Trade-offs
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Anti-Patterns Impacting Maintainability
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Pitfalls in Designing Maintainable Systems
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Conclusion: Navigating the Landscape of Maintainable System Design
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Introduction: The Imperative of Resilience in Modern Systems
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Key Performance Indicators for Resilient Systems
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Modelling Resilience Non-Functional Requirements (NFRs)
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Solution Options for Highly Resilient Systems
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Design Patterns for Resilient Systems
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Gen AI in High Resilient Systems
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Conclusion
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Introduction: The Imperative of Resilience in Modern Systems
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Interplay with Other System Attributes
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Methodologies for Evaluating Resilience System Design Trade-offs
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Anti-Patterns Impacting Resilience
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Pitfalls in Designing Resilience Systems
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Conclusion: Navigating the Landscape of Resilience System Design
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Introduction: The Imperative of Usability in Modern Systems
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Key Performance Indicators (KPIs) for Usability Systems
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Modelling Usability Non-Functional Requirements (NFRs)
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Solution Options for Highly Usable Systems
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Design Patterns for Usability Systems
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Gen AI in High Usability Systems
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Conclusion
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Introduction: The Imperative of Usability in Modern Systems
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Interplay with Other System Attributes
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Methodologies for Evaluating Usability System Design Trade-offs
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Anti-Patterns Impacting Usability
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Pitfalls in Designing Usable Systems
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Conclusion: Navigating the Landscape of Usability System Design
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Why Sizing, Measurement, and Monitoring Are Essential for NFRs
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Sizing for NFRs: Getting It Right
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Analytical Modelling for NFRs: Predicting System Behaviour
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NFR Testing: Going Beyond Functional Testing
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Continuous Monitoring: Keeping Your NFRs in Check
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Addressing Anti-Patterns and Pitfalls in NFR Implementation
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Future Trends: Adaptive NFRs in Evolving Architectures
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Closing Thoughts
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