If you let users try more versions of the software during the year, the MTBF suffers because there are more opportunities for user-visible breakage. However, you can also discover areas that would benefit from additional test coverage. If these tests are implemented, each improvement protects against some future failure. Careful reliability management combines the limits on uncertainty due to test coverage with the limits on user-visible faults in order to adjust the release cadence. This combination maximizes the knowledge that you gain from operations and end users. These gains drive test
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