Quality model for evaluating platform as a service in cloud computing

Abstract

Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet. Cloud computing can be offered in three ways namely: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Researchers have begun to investigate quality in SaaS and have proposed quality models in this regard. There is however a dearth of literature investigating quality in PaaS and IaaS which form the motivation for this work. In this paper, therefore a model is proposed for evaluating quality of PaaS. We first define key features of PaaS. And then, we derive quality attributes from the key features, and define metrics for the quality attributes. To validate our quality model for PaaS, we conduct assessment based on case studies using the Analytic Hierarchy Process. By using the proposed PaaS quality model, developers will be able to select suitable PaaS solutions among alternatives.