Functional Requirement

A precise, testable behavior that the product or service must carry out.

Key Points

  • Defines what the solution does: actions, inputs, outputs, and rules.
  • Different from non-functional requirements, which describe quality attributes like performance or security.
  • Should be clear, measurable, traceable, and testable.
  • Often captured as user stories, use cases, or acceptance criteria in agile backlogs.

Example

When a customer submits an order, the system validates the items, calculates tax, and sends a confirmation email within 1 minute.

PMP Example Question

Which of the following best represents a functional requirement for an e-commerce platform?

  1. The system must maintain 99.9% uptime during peak season.
  2. The application shall allow users to reset their password via a verification email.
  3. Stakeholder satisfaction should improve quarter over quarter.
  4. The project team will adopt Scrum with 2-week sprints.

Correct Answer: B - required product behavior

Explanation: Option B describes a specific behavior the product must perform, which is a functional requirement. The others are non-functional (A), a business goal (C), and a process choice (D).

Advanced Lean Six Sigma — Data-Driven Excellence

Solve complex problems, reduce variation, and improve performance with confidence. This course is designed for professionals who already know the basics and want to apply advanced Lean Six Sigma tools to real business challenges.

This is not abstract statistics or theory-heavy training. You’ll use Excel to perform real analysis, interpret results correctly, and apply tools like DMAIC, SIPOC, MSA, hypothesis testing, and regression without memorizing formulas or relying on expensive software.

You’ll learn how to measure baseline performance, analyze process capability, use control charts to maintain stability, and validate improvements using statistical evidence. Templates, worked examples, and structured walkthroughs help you apply each concept immediately.

Learn through a complete, real-world Lean Six Sigma project and develop the skills to lead data-driven improvements with credibility. If you’re ready to move beyond basics and make decisions backed by data, enroll now and take your Lean Six Sigma expertise to the next level.



Become an AI-First Agile Leader!

HK School of Management empowers you to master AI as your most powerful co-pilot—without the complexity. Transform your agile leadership with practical, prompt-based workflows and proven strategies designed for real-world scrum challenges. For the price of lunch, you get the tools to automate mundane tasks, refine backlogs with precision, and drive unprecedented efficiency in your team. Backed by our 30-day money-back guarantee—zero risk, real impact.

Learn More