A Survey of Software as a Service Delivery Paradigm
Software as a Service (SaaS) is a novel model of software delivery. It has been gaining momentum in recent years. More and more SaaS adoption succeeds. This paper presents an overview of this emerging model. The authors compare SaaS with legacy software delivery model, and also with Service-oriented architecture (SOA). They investigate SaaS from different perspectives, from development to business model, analyze the competition between SaaS and legacy software, and discuss possible challenges and subsequences. After the survey, they conclude that SaaS could gradually take over the whole market. However, the integration, configuration and customization capability will decide whether a SaaS solution is successful or not.