A service level agreement is an agreement between two or more parties, one of which is the customer and the other service providers. It can be a legally binding formal or informal “treaty” (e.g. B internal departmental relations). The agreement can include separate organizations or different teams within an organization. Contracts between the service provider and other third parties are often referred to as SLAs (wrongly) – since the performance level is set by the (principal) customer, there can be no “agreement” between third parties; These agreements are simply “contracts”. However, company-level or OLA-level agreements can be used by internal groups to support ASAs. If an aspect of a service has not been agreed with the customer, it is not an “SLA”. Since the late 1980s, SLAs have been used by fixed telecommunications operators. Today, SLAs are so prevalent that large organizations have many different SLAs in the company itself. Two different units in an organization write an SLA, one being the customer and the other the service provider.
This approach helps maintain the same quality of service across different units of the organization and across multiple locations in the organization. This internal SLA scripting also makes it possible to compare the quality of service between an internal department and an external service provider.  The main point is to create a new layer on the network, cloud or SOA middleware, capable of creating a negotiation mechanism between service providers and consumers. For example, the EU-funded Framework 7 research project SLA@SOI, which investigates aspects of multi-tier, multi-vendor SLAs within service-oriented infrastructure and cloud computing, while another EU-funded project, VISION Cloud, has delivered results for content-oriented ASAs. Typically, ESAs include many elements, from the definition of services to the termination of the contract.  In order to ensure strict compliance with the AGREEMENTS, these agreements are often designed with specific dividing lines and the parties concerned must meet regularly to create an open forum for communication. The rewards and penalties applicable to the supplier are often indicated. Most LTC also leave room for periodic (annual) audits to make changes.  Many LTC meet the specifications of the Information Technology Infrastructure Library when applied to IT services.
The underlying advantage of cloud computing is that of shared resources that are supported by the underlying nature of a common infrastructure environment. Therefore, SLAs span the entire cloud and are offered by service providers as a service agreement and not a customer-based agreement. Measuring, monitoring, and reporting on cloud performance is based on the final UX or its ability to consume resources. The disadvantage of cloud computing compared to SLAs is the difficulty of determining the cause of service interruptions due to the complexity of the nature of the environment.  For example, Section 252(c)(1) (“Trading Obligation”) requires established local stock exchange operators (ILECs) to negotiate in good faith issues such as resale and access to rights of way. . . .