In the current version of the ITIL library (version 3), ANS is part of the context of service design processes, especially in the service level management (SLM) process. SLM includes the negotiation, agreement and correct documentation of service levels that meet commercial requirements and allows the provision of IT services in the desired quality. It is precisely in this context that the END has a fundamental meaning since it defines, accepts and formalizes the levels of service expected by the IT client. In accordance with the Brazilian ABNT NBR ISO/IEC 20,000-1:2011 standard, this document must be agreed between applicants (or is interested in a specific IT department) and the person in charge of the ORGANISATION`s IT services, and should be reviewed regularly to ensure that it remains appropriate to the organisation`s business requirements. In the Brazilian public administration, the sanction resulting from the END is qualified as a matching of the payment, so that the adjustments to the payments provided in the END are not confused with the contractual fine which is one of the administrative sanctions provided by the legislation. Although it is entirely possible to combine these two situations in the same contract, the text should be clear as to the date of application of the traditional fine requiring an administrative procedure or the date of the immediate adequacy of payment on the basis of the provision appeased by the means provided by the END.  Frequent Brief Expressions: 1-400, 401-800, 801-1200, Plus When executing the contract, the follow-up of the performance indicators defined in the NDS is carried out, the data of which serve as an inventory for reporting on service levels under the conditions and frequency provided for under the contractual conditions. The performance of the third party is in front of the objectives of the service levels that trigger adjustments of payments in relation to the quality of the service.   The traditional contract is supplemented by the NDS, which contains clauses exclusively focused on quality of service, effective evaluation of service and the consequences of a breach of contract.