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Capacity headroom forecast
Estimate how many months remain before a resource reaches its safe limit, given growth.
Reliability & managed IT servicesHow it's worked out
- Months = ln(threshold ÷ current) ÷ ln(1 + growth)
- Steady compound growth; linear capacity scaling
NoteUse peak, not average, utilisation. Compound growth assumes the recent trend continues.
Source: ITIL capacity and performance management; Google SRE book (capacity planning)
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