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Functional requirements

Specific, testable statements of what a product or system must do or let users do.

Say it to an AI

Write the Requirements section of our payroll-run PRD. Keep functional requirements to three lines, then add non-functional requirements for performance, security (2FA, encryption, audit log), accessibility (WCAG 2.2 AA) and reliability (no double payments).

How an expert would brief the stronger version of “Payroll PRD requirements”.

See it

Try it as a puzzle →

A fintech startup specs the payroll run for small businesses paying up to 50 employees.

Study A · the weaker one
Study B · the stronger one

Why: Both list adding employees, approving the run, direct deposit and pay stubs; B compresses them to make room for the rest.

Related words

  • Scope
  • Success criteria
  • Constraints
  • MoSCoW
  • MVP
  • Scope creep
  • Riskiest assumption
  • Dependency

Room 4 · Requirements & scope

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