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function point

A metric that quantifies how much business functionality an information system delivers, used to determine the functional size of a software system.

Key Points

  • Technology-agnostic sizing based on what users can do with the system.
  • Counts typical elements such as external inputs, external outputs, external inquiries, internal logical files, and external interface files.
  • Supports effort estimation, productivity benchmarking, scope control, and vendor contracting.
  • Can be calculated early from requirements and refined as details emerge (e.g., IFPUG or COSMIC methods).

Example

A project team scoping a new banking app identifies features like create account (input), view balance (output), transaction search (inquiry), customer data (internal file), and credit-bureau interface (external file). They tally the function points to estimate effort and compare vendor proposals.

PMP Example Question

Which metric should a project manager use to size the scope from business requirements in a technology-independent way to support effort estimates for a new payroll system?

  1. Story points
  2. Function points
  3. Lines of code
  4. Velocity

Correct Answer: B — Function points

Explanation: Function points measure user-visible functionality independent of technology, enabling functional size estimation. Story points and velocity are team-specific agile measures, and lines of code depend on the chosen technology.

Advanced Project Management — Measuring Project Performance

Move beyond guesswork and status reporting. This course helps you measure real progress, spot problems early, and make confident decisions using proven project performance techniques. If you manage complex projects and want clearer visibility and control, this course is built for you.

This is not abstract theory. You’ll work step by step through Earned Value Management (EVM), learning how cost, schedule, and scope come together to show true performance. You’ll build a solid foundation in EVM concepts, understand why formulas work, and learn how performance data actually supports leadership decisions.

You’ll master Work Breakdown Structures (WBS), control accounts, and budget baselines, then apply core EVM metrics like EAC, TCPI, and variance analysis. Through a detailed real-world example, you’ll forecast outcomes, analyze trends, and understand contingencies and management reserves with confidence.

Learn how experienced project managers monitor performance, communicate results clearly, and take corrective action before projects slip. With practical exercises and hands-on analysis, you’ll be ready to apply EVM immediately. Enroll now and start managing performance with clarity and control.



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