Aiming to solve the inconsistencies between various methods arising from the model of Function Point Analysis, proposed by Allan Albrecht, and to establish a more rigorous method of measuring functional size, a group called WG12 (Working Group 12) was formed, subject to SC7 ( SubCommittee Seven) of JTC1 (Joint Technical Committee One) established by ISO (International Organization for Standardization) in conjunction with the IEC (International Engineering Consortium).

As a result of the work of WG12, the STANDARD 14.143 was established, which is split into five parts:

14143–1: Concepts Definition 

14143–2: CONFORMITY Assessment of SOFTWARE Measurement Methods in Relation to ISO/ IEC 14.143–1

14143–3: Verification of a Functional Size Measurement Method

14143–4: Reference Model for Functional Size Measurement

14143–5: Determination of Functional Domains for use with Functional Size Measurement

ISO / IEC 14.143 was developed to ensure that all the functional size measurement methods are based on similar concepts and can be tested to ensure that they behave similarly and as EXPECTED by a method of measurement, DEPENDING on the functional domains that they are applied.

At the end of 2002 the technique of Function Point Analysis, as defined in version 4.x of the IFPUG manual, was approved (under the standard 20.926) as a Functional Size Measurement Method, adhering to ISO / IEC 14143.

Aiming to solve the inconsistencies between various methods arising from the model of Function Point Analysis, proposed by Allan Albrecht, and to establish a more rigorous method of measuring functional size, a group called WG12 (Working Group 12) was formed, subject to SC7 ( SubCommittee Seven) of JTC1 (Joint Technical Committee One) established by ISO (International Organization for Standardization) in conjunction with the IEC (International Engineering Consortium).

As a result of the work of WG12, the standard 14.143 was established, which is split into five parts:

14143–1: Concepts Definition 

14143–2: Conformity Assessment of Software Measurement Methods in Relation to ISO/ IEC 14.143–1

14143–3: Verification of a Functional Size Measurement Method

14143–4: Reference Model for Functional Size Measurement

14143–5: Determination of Functional Domains for use with Functional Size Measurement

ISO / IEC 14.143 was developed to ensure that all the functional size measurement methods are based on similar concepts and can be tested to ensure that they behave similarly and as expected by a method of measurement, depending on the functional domains that they are applied.

At the end of 2002 the technique of Function Point Analysis, as defined in version 4.x of the IFPUG manual, was approved (under the standard 20.926) as a Functional Size Measurement Method, adhering to ISO / IEC 14143.