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ITIL 4 consists of 34 practices grouped into 3 categories: General management practices: some examples are: Strategy management, Portfolio management, Architecture management and Risk management; Service management practices: examples are: Service-level management, Availability management and Capacity and performance management
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 ...
A service desk is a primary IT function within the discipline of IT service management (ITSM) as defined by ITIL. It is intended to provide a Single Point of Contact (SPOC) to meet the communication needs of both users and IT staff, [7] and also to satisfy both Customer and IT Provider objectives.
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®.
ISO/IEC 20000 is the international standard for IT service management.It was developed in 2005 by ISO/IEC JTC1/SC7 and revised in 2011 and 2018. [1] It was originally based on the earlier BS 15000 that was developed by BSI Group.
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:
Because, contrary to the variations of the service level, the service level does not only reflect the stockout event but also the amount backordered, it is widely used in industrial practice. Also, by the definitions, comparing service levels we have α ≤ β {\displaystyle \alpha \leq \beta } whenever the probability of zero demand equals 0.
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.