Modernization of Information Systems at Red.es: An Approach Based on Gap Analysis and ADM Marcos López-Sanz 1(&) , Valeria de Castro 1 , Esperanza Marcos 1 , and Jorge Moratalla 2 1 Kybele Research Group, Rey Juan Carlos University, C/Tulipan s/n, Móstoles, 28933 Madrid, Spain {marcos.lopez,valeria.decastro, esperanza.marcos}@urjc.es 2 Red.es. Ministry of Industry, Energy and Tourism, Edificio Bronce, Plaza Manuel Gómez Moreno, s/n, 28020 Madrid, Spain jorge.moratalla@red.es Abstract. This paper presents a method for the modernization of information systems that allow organizations to maintain the capabilities of existing infor- mation systems. This method defines a horseshoe-like process based on ADM (Architecture-Driven Modernization), and applies gap-analysis techniques to detect the possible reuse of current functionalities to build modernized systems. The proposal has been developed, refined and validated at Red.es, one of the Spanish Government’s Public Entities. Our proposal includes the definition of a process, the models used in each step, and sets of rules that can be used to progress in this process. The proposed method thus permits systematic progress to be made in a system modernization process: obtaining the business models of the legacy system, comparing them with redefined business models incorpo- rating new business rules, and finally, implementing them by adapting and reusing the existing code. Keywords: Information system modernization  Domain name management systems  Architecture driven modernization  Gap analysis 1 Introduction When modernizing public organizations’ business processes, the optimization of the services provided, and particularly the Information Systems (IS) supporting them, becomes a key factor [1–3]. The goal is to make them more competitive and ef ficient in resource use and service delivery, thus improving the State’s relationship with its citizens. This is the case of Red.es, a Public Entity linked to the Spanish Ministry of Industry, Energy and Tourism. One of its main duties is to act as the Spanish Authority for the ‘.es’ domain name management. Its current strategy for the promotion of the information society emphasizes the need to adapt its applications IS to aspects of the new legislative framework on interoperability [4] and eGovernment [5]. © Springer International Publishing AG 2017 M. Maximilien et al. (Eds.): ICSOC 2017, LNCS 10601, pp. 490–498, 2017. https://doi.org/10.1007/978-3-319-69035-3_36