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ITSM Metrics: Known Knowns, Known Unknowns and Unknown Unknowns

Former US Secretary of Defense Donald Rumsfeld Common sense tells us we ought to choose a select few ITSM metrics which clearly demonstrate value. But what happens if we outgrow our original metrics? Or the goalposts change? Or we acquire 15 different companies? Similarly, once we have completed the basics and want to start exploring continual service improvement – Do we start all over again?... 

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