Effective Coverage % (ECV%)
CloudQuell’s headline commitment metric: Coverage × Utilization — how much of your eligible spend is both committed and actually used.
Effective Coverage % combines two things most dashboards report separately: how much of your eligible compute is on a commitment (Coverage), and how much of that commitment you actually use rather than waste (Utilization). Multiplying them gives a single honest number for how well your Savings Plan / Reserved Instance program is really working.
Effective Coverage % = Coverage × Utilization, where Coverage = $ eligible compute on commitments ÷ $ eligible compute total (measured at on-demand-equivalent rates), and Utilization = $ commitment used ÷ $ commitment purchased (dollar-weighted across the portfolio). A 95% coverage at 70% utilization is only 66.5% effective coverage — the unused third erodes the benefit.
Effective Coverage % is live in the CloudQuell product, computed from your CUR on the Commitments view. A public benchmark calculator for it is coming to this tool in a later phase.
FAQ
Why multiply coverage by utilization?
Because high coverage with low utilization is a false comfort — you are paying for commitments you are not using. Effective Coverage % captures the net effect in one number.