--- title: Non-Functional Requirements (with Examples) | daily.dev description: Non-functional requirements (NFRs) describe system-level quality attributes — how a system should be, not just what it should do. Unlike functional... canonical: https://daily.dev/posts/non-functional-requirements-with-examples--6eoqfc0xx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Non-Functional Requirements (with Examples) | daily.dev og:description: Non-functional requirements (NFRs) describe system-level quality attributes — how a system should be, not just what it should do. Unlike functional... og:url: https://daily.dev/posts/non-functional-requirements-with-examples--6eoqfc0xx og:image: https://api.daily.dev/og/posts/6EOqfC0XX.png og:image:alt: Non-Functional Requirements (with Examples) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Non-Functional Requirements (with Examples) **[Khalil Stemmler](https://daily.dev/sources/khalilstemmler)** · 12 min read · 0 upvotes · 0 comments ## Summary Non-functional requirements (NFRs) describe system-level quality attributes — how a system should be, not just what it should do. Unlike functional requirements tied to specific features, NFRs like performance, scalability, reliability, usability, and maintainability apply to the system as a whole. They are divided into execution qualities (observable at runtime) and evolution qualities (affecting how code can be changed over time). Failing to identify NFRs early is a leading cause of project failure. Best practices include uncovering NFRs early, making them measurable and quantitative, and using popular products as quality baselines. NFRs also heavily influence architectural decisions — for example, a usability requirement around background media uploads may necessitate an event-driven architecture with a job queue. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How to write nonfunctional requirements for AI agents](https://daily.dev/posts/how-to-write-nonfunctional-requirements-for-ai-agents-rkloey5vv) · InfoWorld · 1 upvotes · 0 comments - [Non-Functional Testing: Beyond the Happy Path – Software Testing News](https://daily.dev/posts/non-functional-testing-beyond-the-happy-path-software-testing-news-rnmswinqy) · Software Testing News · 0 upvotes · 0 comments - [Reliability Is Not a Feature. It Is a Discipline](https://daily.dev/posts/reliability-is-not-a-feature-it-is-a-discipline-vxcayglay) · Medium · 2 upvotes · 0 comments --- Tags: [#career](https://daily.dev/tags/career), [#architecture](https://daily.dev/tags/architecture), [#domain-driven-design](https://daily.dev/tags/domain-driven-design) [View this post on daily.dev](https://daily.dev/posts/non-functional-requirements-with-examples--6eoqfc0xx) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Non-Functional Requirements (with Examples)","url":"https://daily.dev/posts/non-functional-requirements-with-examples--6eoqfc0xx","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/non-functional-requirements-with-examples--6eoqfc0xx"},"datePublished":"2026-06-17T11:25:43.289Z","dateModified":"2026-06-17T11:29:24.830Z","description":"Non-functional requirements (NFRs) describe system-level quality attributes — how a system should be, not just what it should do. 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