TLDR if your test suite typically takes 4 hours to run, and a Launchable subset that yields 90% confidence only takes 1.5 hours, then your hours saved for that run will be 2.5 hours/run. Multiply that by number of runs per year.Details Every time you request a subset of tests to run, you send Launchable your full list of tests in your test suite along with an optimization target. Launchable returns a subset of the full list you sent based on that optimization target. Therefore, we calculate hours saved by taking the difference between the typical duration of the full list of tests (based on historical data) and the duration of the subset of tests from Launchable.