A Generic Model for the Specification of Software Interface Requirements and Measurement of their Functional Size

Keywords non functional requirements Functional Size Measurement Method ISO ecss international standards adopted standards Software interfaces
Standards groups

The European ECSS-E-40 series of standards for the aerospace industry includes interfaces as one of 16 types of non functional requirement (NFR) for embedded and real-time software. An interface is typically described at the system level as a non functional requirement, and a number of concepts and terms are provided in that series to describe various types of candidate interfaces. This paper collects and organizes these interface-related descriptions into a generic model for the specification of software interface requirements, and to measure their functional size for estimation purposes using the COSMIC ISO 19761 standard.

Document identifier
DOI 10.1109/SERA.2010.1356
Date published
Document type
technical white paper
Defines standard
Replaced/Superseded by document(s)
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Khalid T. Al-Sarayreh, Alain Abran
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