Language: English
Version: 1.0
Publication date: 2024
19 pages

The Easy Functional Sizing (EFS) method provides a simplified and accessible approach to functional size measurement. It is based on the high level function point analysis as described in the Nesma counting guidelines and has been further streamlined to reduce complexity and ambiguity in practical use. This makes EFS particularly well-suited for use in modern development environments such as Agile and DevOps.

This international standard is part of the official Nesma publications. It is intended for everyone involved in functional size measurement — from novice analysts to experienced professionals — and enables consistent and independent sizing, even with limited prior experience. The EFS method ensures results that are comparable to traditional high level analyses, as demonstrated in supporting research (see appendix A of the standard).

This publication provides both a theoretical foundation and practical guidance, making it easier to apply functional size measurement in a wide range of projects and organizational settings.