Non-Functional Requirements

Summary

Requirements about how a system behaves rather than what it does — performance, security, accessibility, scalability — easy to forget because they're invisible until they fail.

• 1Add a non-functional requirements section to a PRD you're practicing with.
• 2Learn to specify performance requirements concretely (e.g. 'loads in under 2 seconds').
• 3Understand why skipping these causes expensive rework late in development.