Service level agreements are also defined at different levels: we will take a look at our catalogue of services to understand the relationship between the sectors involved and individual service delivery processes. For example, high-end or standard services, incidence or requirement services, or any other distinction between services. A Service Level Contract (SLA) is a contract describing the level of service a customer expects from their supplier. Applies to a specific user within a service that has a standard ALS. It is useful to offer another treatment to a client we want to capture, keep or pay special attention to. The most important condition in designing a good ALS is to ensure that our company is able to comply with the agreement. To conclude viable agreements, we will analyze both the service we provide and the internal structure we use to deliver them. Since the late 1980s, SLAs have been used by fixed-line operators. Today, ALS is so widespread that large organizations have many different ALSs within the company itself. Two different units in an organization script an ALS, one unit being the customer and another the service provider. This helps maintain the same quality of service between different units of the organization and in several sites within the organization.
This internal ALS script also compares the quality of service between an internal service and an external service provider.  SLAs are used to establish measurable indicators for the service we provide, to ensure that our customers` expectations are met. Apply a standard ALS to all customers who order the same service. It is useful for our company to offer different services with different resolution and response times. FP7 IRMOS also examined aspects of translation of ALS terms at the application level into resource-based attributes to bridge the gap between customer expectations and cloud provider resource management mechanisms.   The European Commission has presented a summary of the results of various ALS research projects (from specifications to monitoring, management and implementation).  A Service Level Contract (SLA) is an obligation between a service provider and a customer. Specific aspects of the service – quality, availability, responsibilities – are agreed between the service provider and the service user.  The most common component of ALS is that services are provided to the client in accordance with the contract. For example, internet service providers and telecommunications companies will generally include service level agreements under the terms of their contracts with customers to define service levels of service level sold in plain language. In this case, ALS generally has a medium-time technical definition between errors (MTBF), average repair time or average recovery time (MTTR); Identifying the party responsible for reporting errors or paying royalties; Responsibility for different data rates throughput; Jitter; or similar measurable details. For example, the sales manager can open applications by creating tickets that use standard ALS for the department, or a more restrictive ALS for business management or an ALS for a specific service within the department as “providers.” The main point is to create a new level for the grid, cloud or SOA middleware, capable of creating a trading mechanism between service providers and consumers.