This part of ISO/IEC14143 provides a summary of the FSM-related standards and the relationship between; the ISO/IEC14143 series FSM framework International Standards that provide the definitions and concepts of FSM, and conformity and verification of FSMMs, and the ISO/IEC standard FSMMs, i.e. ISO/IEC19761, ISO/IEC20926, ISO/IEC20968, ISO/IEC24570 and ISO/IEC29881. This part of ISO/IEC14143 also provides a process to assist users to select and develop an FSMM that meets their requirements as well as providing guidance on how to use FS. FSMMs include, but are not limited to, ISO/IEC19761, ISO/IEC20926, ISO/IEC20968, ISO/IEC24570 and ISO/IEC29881. NOTE An FSMM is a software sizing method that conforms to the mandatory requirements of ISO/IEC14143-1. Recommending a specific FSMM is outside the scope of this part of ISO/IEC14143. The audiences of this part of ISO/IEC14143 are: users and potential users of FSM; and developers of an FSMM.