Direct versus indirect costs are those that are either: 1) clearly directly attributable to a specific service, versus 2) indirect costs that are shared among multiple services. These costs should be approached logically to first determine which line items are sensible to maintain, given the data available and the level of effort required. For example, hardware maintenance service components can be numerous and detailed, and it may not be of value to decompose them all for the purpose of assigning each to a line item cost element. Once the depth and breadth of cost components are appropriately identified, rules or policy to guide how costs are to be spread among multiple services may be required. In the hardware maintenance example, rules can be created so that a percentage of the maintenance is allocated to any related services equally, or allocation rules could be based on some logical unit of consumption. Perceived equality of consumption often drives such decisions.
Labour costs are another key expenditure requiring a decision to be made. This decision is similar to that of 'direct versus indirect' above, compounded by the complexity and accuracy of time tracking systems. If the capability to account for resources allocated across services is not available, then rules and assumptions must be created for allocation of these costs. In its simplest form, organizing personnel costs across financial centres based on a service orientation is a viable method for aligning personnel costs to services. Similarly, administration costs for all IT Services can be collected at a macro level within a financial centre, and rules created for allocation of this cost amongst multiple services.
Variable cost elements include expenditures that are not fixed, but which vary depending on things such as the number of users or the number of running instances. Decisions need to be made based on the ability to pinpoint services or service components that cause increases in variability, since this variability can be a major source of price sensitivity. Pricing variability over time can cause the need for rules to allow for predictability. Associating a cost with a highly variable service requires the ability to track specific consumption of that service over time in order to establish ranges. Predictability of that cost can be addressed through:
In order to have a good understanding of ITIL and the importance of configuration management, we first define what ITIL is: ITIL is literally a collection of documentation.
This documentation can help IT organizations implement the best practices. The documentation grows and grows as more successful techniques are documented and guidelines established for what can make others successful. The latest ITIL resources are published by the UK Office of Government Commerce (OGC).
Integrated service delivery refers to the need for Configuration Management, Change Management, Incident Management, Problem Management and Release Management processes that are linked together in a meaningful manner. For example, the process of releasing components to the live environment (the domain of Release Management) is also an issue for Configuration Management and Change Management whilst the Service Desk is primarily responsible for liaison between IT providers and the Users of services. This section highlights the links and the principal relationships between all the Service Management and other infrastructure management processes.
ITIL processes fall under Operational Layer or Tactical Layer, as follows:
|Operational Layer:||Configuration Management - Service Desk Management - Incident & Problem Management - Change Management - Release Management|
|Tactical Layer:||Service Level Management - Availability Management - Capacity Management - Continuity Management - Financial Management|