This video shows each dimension of the Quality page and how Pensero calculates it. It takes about 5 minutes.
What the video explains
The five headline metrics: defect cost, rework rate, revert rate, duplicate code rate and test coverage.
Quality tax: defect cost, why recent defect cost is low at first (about 90% is known 30 days after merge), rework and code stickiness.
Code health: reverts, duplicate code, test coverage weighted by added lines, and bug lifetime.
Quality distribution: the quality vs delivery chart, how the relative 0–100 scores work, and what each corner means.
All the numbers in the video are examples.