Effectiveness (ITILv3): [Continual Service Improvement] A measure of whether the Objectives of a Process, Service or Activity have been achieved. An Effective Process or Activity is one that achieves it agreed Objectives.
See also: KPI
Effectiveness (ITILv2): Effectiveness, or Cost Effectiveness, is one of the measures needed to determine value for money. It concerns the cost of the outputs from an activity and the conformance of those outputs to a specification or need. Typical measures will include money, time, people and quality. Any investment that increases the cost of providing IT services should result in an enhancement to service quality or quantity. If this is not so, then the business case must be quite clear about why the Change is necessary.
See also: Economy, Efficiency, Equity, Financial Management for IT Services, Value for Money
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