Towards Semi-Automatic Size Measurement of User Interfaces in Web Applications with IFPUG SNAP

Software Non-functional Assessment Process is a non-functional size measurement method proposed by the International Function Point Users Group. It can be used to measure the size of non-functional requirements related to usability of graphical user interfaces (UI). Unfortunately, measuring such requirements seems time-consuming because it requires identifying all UI elements and graphical properties that were configured to meet these requirements. In this paper, we propose a semi-automated approach to measure size of non-functional related to user interfaces of web applications. The method takes as an input a set of exemplary screens of application (HTML and CSS) and rules describing the mapping between HTML elements and UI Elements. The method provides a list of UI Elements and graphical properties that were configured as an output. We preliminarily validated the proposed method using a prototype tool that we had developed.