I would like to begin a discussion on ITIL Capacity Management. This is often an overlooked, yet strategic, part of the ITIL Service Delivery model.
Most organizations tend to perform "rule of thumb" capacity planning or use some kind of "scope 2, buy 5" method to ensure excess capacity. Funny thing is, people are only making their environments more complex...admittedly, adding more servers to meet capacity needs has not resolved daily performance firefights.
On a weekly basis, I run into a new Fortune 500 company that is running their infrastructure at an average utilization of 10% or less. Perhaps you are one of them. Perhaps you find this acceptable behavior. Funny thing #2...most would love to have their capacity utilization at 30 - 40%.
Anyone care to support why their "scope 2, buy 5" approach is a good ITIL capacity management solution?
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