Function Point

A function point measures how business-worthy an information system component is to the end user. As a single unit, the cost of a function point is based on previous projects. Although there is no widely recognised method in the sizing result, there have been many approaches to bring it closer to a standardising convention

As of 2013, these are −

ISO Standards
COSMIC − ISO/IEC 19761:2011 Software engineering. A functional size measurement method.

FiSMA − ISO/IEC 29881:2008 Information technology - Software and systems engineering - FiSMA 1.1 functional size measurement method.

IFPUG − ISO/IEC 20926:2009 Software and systems engineering - Software measurement - IFPUG functional size measurement method.

Mark-II − ISO/IEC 20968:2002 Software engineering - Ml II Function Point Analysis - Counting Practices Manual.

NESMA − 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.


Object Management Group (OMG), an open membership and not-for-profit computer industry standards consortium, has adopted the Automated Function Point (AFP) specification led by the Consortium for IT Software Quality.

Function Point Analysis (FPA) technique quantifies the functions within software that are meaningful to the users. The functions are based on the requirements specification.