Coverage is a useful tool, but total number of test cases is a better predictor of test effectiveness! https://blog.acolyer.org/2014/10/21/coverage-is-not-strongly-correlated-with-test-suite-effectiveness/
miniblog.
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A charming text editor UI where you can doodle line drawings alongside text: https://akkartik.name/lines.html
This shows the effectiveness of doing a small number of things in the interface.
On the engineering effectiveness of shared internal communications, rather than siloed emails.
https://www.mattritter.me/?p=526
The effectiveness of fuzzing, the limitations of current research, your best options today, and a worked example: