Term Kind Topic What it is
Cost Per Transaction metric Performance vs Cost Infrastructure cost divided by business volume, which reveals efficiency trends that absolute spend conceals.
Latency Revenue Elasticity metric Performance vs Cost The measured change in a business outcome per unit of added or removed latency, which turns "faster is better" into an amount of money and tells you when to stop buying milliseconds.
Performance versus Cost concept Performance vs Cost The trade between latency and spend — where headroom is the mechanism and high utilisation is the false economy.