These systems and processes are often controlled by specialized third-party companies. If this is the case, it is necessary that the third party is also involved in the AAA negotiations. This gives them details of the service levels to be followed and explanations on how to track them. 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. Kunci keberhasilan Level Agreement terletak pada metrik yang diterapkan untuk menentukan apakah penyedia layanan mempertahankan akhir dari tawar-menawar mereka. FP7 IRMOS also looked at aspects of translating application-level SLAs into resource-based attributes to bridge the gap between customer expectations and cloud provider resource management mechanisms.   The European Commission presented a summary of the results of different research projects in the field of ASAs (from specifications to control, management and implementation).  Key elements of a service level agreement include the timing of notification of network changes that may affect users and general service usage statistics. Seperti yang sudah Glints jelaskan, Service Level Agreement adalah sebuah kontrak yang diperlukan agar bisnis dapat berjalan dengan lancar.
If both parties agree to include Earn Backs in the SLA, the process should be carefully defined at the beginning of the negotiation and integrated into the service level methodology….