A Modernized Model for Performance Requirements and their Interdependencies

With the current rapid changes in technologies and business demands, the IT service providers have to configure and adapt their IT system landscapes to cope with the dynamic changes. However, the effects of the adopted changes to the Quality of Service (QoS) must be considered in order to sustain the Service Level Agreements (SLA). QoS is strongly characterized by the Non-Functional Requirements (NFRs) of the system. Among these NFRs, performance is considered one of the most dominant factors to be recognized, where performance requirements can have a comprehensive impact on the system. An earlier study has uncovered some of the deficiencies in the current understanding of the employed terminologies, definitions, and classifications regarding performance requirements. Accordingly, it has proposed a clear model that could diminish the misconceptions or the contradictions among the various classifications. In this paper, an interdependency model will be conducted based on the earlier mentioned model Thus, this interdependency model will aim to reveal the complex interdependencies between the declared performance requirements and regulate the interplay between them. Furthermore, to provide a sufficient evaluation of the proposed performance model, an assessment of the model will be presented based on an online survey that was distributed to various IT practitioners and experts from different IT engaged organizations.