Non-Functional Requirements (NFRs) Framework for Software Systems - The Taxonomy of Non-Functional Requirement (NFR) Categories

Non-Functional Requirements (NFRs) Framework for Software Systems

Chapter 9. The Taxonomy of Non-Functional Requirement (NFR) Categories

The Taxonomy of Non-Functional Requirement (NFR) Categories — Non-Functional Requirements (NFRs) Framework for Software Systems

Authored and Published By: The International Foundation for Information Technology (IF4IT), LLC

Executive Summary: Chapter Overview

IF4IT

The Bottom Line

This chapter introduces the taxonomy of Non-Functional Requirement (NFR) categories used throughout the framework. It gives readers a structured landscape for scanning platform, security, operations, experience, economic, governance, and cross-cutting quality concerns before reviewing detailed category guidance.

Core Concepts

ConceptDefinition & Strategic Role
Category LandscapeOrganizes NFRs into major quality, operating, risk, governance, and cross-cutting categories that help teams scan for completeness.
Applicability AnalysisHelps teams decide which categories apply, which require tailoring, and which can be marked not applicable with rationale.
Framework NavigationProvides the structure readers use to move from broad NFR categories into detailed best-practice guidance.

Quick Q&A

Question: How should readers use this chapter?

Answer: Readers should use the chapter to identify applicable NFR concerns, clarify ownership, define measurable expectations where appropriate, establish validation methods, collect evidence, and connect decisions to lifecycle and governance processes.

Read More Below

Overview

This section of the document introduces numerous major NFR Categories that are recommended to be addressed when creating NFRs for a new or intended-to-be-modified software system.

  1. Platform and runtime,

  2. Security, compliance and data,

  3. Operations and delivery,

  4. Experience and integration,

  5. Economic and governance, and

  6. Cross-cutting essentials (such as validation, metrics, evidence, standards, and traceability).

This landscape is intended to help readers better understand the overall NFR taxonomy before they review the detailed category-specific best practices.

The Taxonomy of Non-Functional Requirement (NFR) Categories — The Non-Functional Requirements (NFRs) Category.
The Non-Functional Requirements (NFRs) Category.

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