Requirements Engineering process for Software-as-a-Service (SaaS) cloud environment

This paper deals with the important topic of Requirements Engineering in cloud computing, specifically on Software as a Services (SaaS) cloud model and presents a new methodology for Requirements Engineering of SaaS by identifying two key questions to handle Requirements in SaaS. The paper evolves by considering a CMMI modification by adding a new element in such a process, specifically devoted to SaaS and proposed a modification in the traditional Requirements Engineering process. The paper also identifies a set of requirement categories that must be considered in SaaS, which may not always be considered in the development process of traditional software.