Goal models for acceptance requirements analysis and gamification design.

The success of software systems highly depends on user engagement. Thus, to deliver engaging systems, software has to be designed carefully taking into account Acceptance Requirements, such as '70% of users will use the system', and the psychological factors that could influence users to use the system. Analysis can then consider mechanisms that affect these factors, such as Gamification (making a game out of system use), advertising, incentives and more. We propose a Systematic Acceptance Requirements Analysis Framework based on Gamification for supporting the requirements engineer in analyzing and designing engaging software systems. Our framework, named Agon, encompasses both a methodology and a meta-model capturing acceptance and gamification knowledge. In this paper, we describe the Agon Meta-Model and provide examples from the gamification of a decision-making platform in the context of a European Project