SLA Validation framework. SLA acts as a safeguard for the service consumers. It always helps a customer to have a safe mode because providers always tend to be flexible about their services. In e-Business platforms, every time unit might count thousands even millions of revenue. So SLA should be validated accordingly, and there should have strong management to make an agreement and to take a decision about any incident. A SLA validation framework [2] might be based on the LAYSI infrastructure model [8], LoM2HiS management model [9], and SLA aggregation and validation model [10]. LoM2HiS (Low-Level Metrics to High Level Service Level Agreement) is a Resource-Level validation system which supplies a mean to convert metrics of resource to parameters placed in high- level service. It offers resource provision that is automatically manageable, in turn, it will synchronize resource provision in low-level with SLO. The service provider uses this system to maintain the quality of services that are mentioned in SLA [2]. It is an integral component of the FoSII project (Foundations of Self-governing ICT Infrastructures) LAYSI is an Infrastructure-Level validation, which is an approach that is based on a layered structure to prevent the violation of SLA [2]. It allows self-adaptable, scalable, and exchangeable components. It is also included in FoSII project (Foundations of Self-governing IXR Infrastructures). It has a workflow service that is responsible for finding out a possibility of threat violation during time response. It escalates the violation threat to the Automatic Service Deployment Layer (ASD) if it fails to fix or define the issue. ASD layer explores its history to find out if there is a similar situation comparing with previous experiments. In this way, it prevents the violation of Service Level Agreement. Privacy, trust, and security are also important factors to be considered during SLA contracts. Because of the details of the aggregation are prevented at each layer, a good strategy called "a distributed top-down validation mechanism" is utilized for the whole validation of a hierarchical SLA aggregation.
