A function point is a unit of measurement to express the amount of business functionality an information system provides to a user. The cost (in dollars or hours) of a single unit is calculated from past projects.
As of 2012, there are five recognized ISO standards for functionally sizing software:
- COSMIC-FFP: ISO/IEC 19761:2011 Software engineering. A functional size measurement method.
- FiSMA FSM: ISO/IEC 29881:2008 Information technology - Software and systems engineering - FiSMA 1.1 functional size measurement method.
- IFPUG FSM Method: ISO/IEC 20926:2009 Software and systems engineering - Software measurement - IFPUG functional size measurement method
- Mk II Function Point Analysis: ISO/IEC 20968:2002 Software engineering - Ml II Function Point Analysis - Counting Practices Manual
- NESMA FPA Method: ISO/IEC 24570:2005 Software engineering - NESMA function size measurement method version 2.1 - Definitions and counting guidelines for the application of Function Point Analysis
Read more about Function Point: Introduction, Benefits, Criticism
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