A tour of the metrics that describe how software teams actually perform — grouped by what they measure: delivery, reliability, productivity, frontend performance, quality, and agile process. What each one means, when it's useful, and how it goes wrong.
For anything users load in a browser, "how fast is it?" is really three questions — loading, interactivity, and visual stability — and the frontend has its own metric stack for each, plus the accessibility, reliability, SEO, and engagement signals that live right next to performance. Here's the whole set in one place.