Functional size (function points) is universally considered to be the square meter of the software industry. It is the only international standard used to measure the size of software in a standardized, objective, repeatable, verifiable and defensible way.
Harold van Heeringen worked for IT service provider Sogeti for 17 years as a senior consultant software metrics/cost estimation consultant. He then moved to IDC (METRI), as a principal consultant and practice lead for IT Intelligence services (including Estimation & Performance Measurement). Harold is a director on the ISBSG board and a board member of Nesma. He regularly publishes white papers, blogs and articles on software metrics and performance measurement.