“…The main concern of decision-makers in HEIs when migrating to the cloud is the QoS aspects, whereas these aspects include for instance availability, reliability, performance [6,20], IT infrastructure [24], cost [25], human capital [26], and service provider [11]. HEIs needs to identify QoS variables from different aspects for instance regulation, cost reduction, and trustworthy [27,28], while another researcher has been identifying other factors such as performance and environments [29,30], ICT infrastructure, user satisfaction, clients' needs security, and reliability [24]. Many researchers start investigate QoS in different aspects such as [31] study QoS from perspective of SLA contract management, [32] also explore QoS from allocating optimal resources, and [33] study QoS from cloud provider aspect to how can provider collaborate consistently to procure more assets in peak time to satisfy their QoS targets.…”