Efficiency (ITILv3):    [Continual Service Improvement] A measure of whether the right amount of resources have been used to deliver a Process, Service or Activity. An Efficient Process achieves its Objectives with the minimum amount of time, money, people or other resources.

See also: KPI

Efficiency (ITILv2):    Efficiency is one of the measures needed to determine value for money. It concerns the ratio of inputs (economy) to outputs (effectiveness) and is sometimes referred to as 'bangs per buck'. Typical measures will include money, time, people and quality.

See also: Economy, Effectiveness, Value for Money

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