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A service-level agreement can track multiple performance metrics. In this context, these metrics are called service level indicators (SLIs). The target value of a given SLI is called a service-level objective (SLO). In IT-service management, a common case is a call center or service desk. SLAs in such cases usually refer to the following SLIs:
Security requirements defined in service level agreements (SLA) and other external requirements that are specified in underpinning contracts, legislation and possible internal or external imposed policies. Basic security that guarantees management continuity. This is necessary to achieve simplified service-level management for information security.
A service-level objective (SLO), as per the O'Reilly Site Reliability Engineering book, is a "target value or range of values for a service level that is measured by an SLI." [1] An SLO is a key element of a service-level agreement (SLA) between a service provider and a customer. SLOs are agreed upon as a means of measuring the performance of ...
ITIL (previously and also known as Information Technology Infrastructure Library) is a framework with a set of practices (previously processes) for IT activities such as IT service management (ITSM) and IT asset management (ITAM) that focus on aligning IT services with the needs of the business.
The objective of the OLA is to present a clear, concise and measurable description of the service provider's internal support relationships. OLA is sometimes expanded to other phrases but they all have the same meaning: organizational-level agreement; operating-level agreement; operations-level agreement. OLA is not a substitute for an SLA.
[4] According to the SIAM Body of Knowledge, [5] the term ‘service integration and management’ or SIAM, and the concept of SIAM as a management methodology originated in around 2005 from within the UK public sector, which was also the source of other best practice methodologies such as ITIL®.
ITIL—Information Technology Infrastructure ... SLA—Service Level Agreement; ... SLM—Service Level Management; SLOC—Source Lines of Code; SME—Subject Matter ...
In the ITIL model, a 'Service' is defined as, "A means of delivering value to customers by facilitating outcomes customers want to achieve without the ownership of specific costs and risks." [ 2 ] The meaning is thus highly business-focused and assumes some degree of outsourcing , although this may just be outsourcing from within the functional ...