The aim should be to fairly integrate best practices and requirements that preserve the service and avoid additional costs. In this section, you should define the policies and scope of this Agreement with respect to the application, extension, modification, exclusion, restrictions, and termination of the Agreement. If the service provider is acquired by another entity or merges with another entity, the customer can expect its SLA to remain in effect, but this may not be the case. The agreement may need to be renegotiated. Don`t make assumptions; Note, however, that the new owner does not wish to alienate existing customers, which allows him to choose to respect the existing SLAs. Most service providers have standard SLAs – sometimes several that reflect different levels of service at different prices – which can be a good starting point for negotiations. However, these should be reviewed and amended by the client and the lawyer, as they are generally inclined to the benefit of the supplier. 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.  Define an appropriate baseline. Defining the right metrics is only half the way. To be useful, metrics must be tailored to a reasonable and achievable level of performance. If strong historical measurement data is not available, you should be prepared to check and adjust the parameters later by a predefined process defined in the SLA. Service availability: the time available for the use of the service….