A Web Service Level Agreement (WSLA) is a standard for monitoring compliance with Service Level Agreements for Web services. Authors can specify the performance assigned to a web service application, the desired performance goals, and the actions to take if performance is not achieved. A service level agreement (SLA) is an obligation between a service provider and a customer. Particular aspects of the service – quality, availability, responsibilities – are agreed between the service provider and the service user. [1] The most common component of an SLA is that services must be provided to the customer as contractually agreed. For example, Internet service providers and telecommunications companies will typically include service level agreements in the terms of their contracts with customers to define the service level(s) sold in plain language. In this case, the SLA usually deconstructs a technical definition in the intermediate period between failures (MTBF), average repair time or mean recovery time (MTTR); identification of the party responsible for reporting errors or paying fees; responsibility for different data rates; throughput; Jitter; or similar measurable details. I service level agreement (in Italian: accordo sul livello del servizio), en sigla SLA, sono strumenti contrattuali attraverso i quali si definiscono le metriche di servizio (es. qualità di servizio) che devono essere rispettate da un fornitore di servizi (supplier) nei confronti dei propri clienti/utenti.

Di fatto, una volta stipulato il contratto, assumono il significato di obblighi contrattuali. The production obtained by the customer through the service provided is at the heart of the service level agreement. As applications are moved from dedicated hardware to the cloud, they must achieve the same or even more demanding service levels than traditional installations. . . .