> bug velocity (increase in the bug number divided by the time interval) over time That quotient is a scalar. Please use "bug rate" instead of "bug velocity". Easy mnemonic: Velocity is a Vector, Speed is a Scalar. "Velocity" has multiple syllables and multiple coordinates, "speed" has one syllable and one coordinate. [Irony: the original poster has an address @nist.gov (US National Institute of Standards and Technology), where they should know and appreciate the difference.] -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct