ISO/IEC 14143-6:2012概述了FSM（功能尺寸测量）相关标准以及以下各项之间的关系: a） ISO/IEC 14143系列FSM框架标准，提供了FSM的定义和概念，以及FSMMs（功能尺寸测量方法）的一致性和验证，以及 b） ISO/IEC标准FSMMs，即ISO/IEC 19761（宇宙）、ISO/IEC 20926（IFPUG）、ISO/IEC 20968（Mk II）、ISO/IEC 24570（NESMA）和ISO/IEC 29881（FiSMA）。 FSMM是一种符合ISO/IEC 14143-1强制性要求的软件分级方法。 ISO/IEC 14143-6:2012还提供了一个过程，以帮助用户选择符合其要求的FSMM。 它还提供了如何使用功能尺寸（FS）的指导。 FSMM还包括但不限于ISO/IEC 19761、ISO/IEC 20926、ISO/IEC 20968、ISO/IEC 24570和ISO/IEC 29881。 推荐特定的FSMM不在ISO/IEC 14143-6:2012的范围内。

ISO/IEC 14143-6:2012 provides a summary of the FSM (Functional Size Measurement) related standards and the relationship between: a) the ISO/IEC 14143 series FSM framework standards that provide the definitions and concepts of FSM and conformance and verification of FSMMs (Functional Size Measurement Methods), and b) the ISO/IEC standard FSMMs, i.e. ISO/IEC 19761 (COSMIC), ISO/IEC 20926 (IFPUG), ISO/IEC 20968 (Mk II), ISO/IEC 24570 (NESMA), and ISO/IEC 29881 (FiSMA). An FSMM is a software sizing method that conforms to the mandatory requirements of ISO/IEC 14143-1. ISO/IEC 14143-6:2012 also provides a process to assist users to select an FSMM that meets their requirements. It also gives guidance on how to use Functional Size (FS). FSMMs include, but are not limited to, ISO/IEC 19761, ISO/IEC 20926, ISO/IEC 20968, ISO/IEC 24570, and ISO/IEC 29881 as well. Recommending a specific FSMM is outside the scope of ISO/IEC 14143-6:2012.