The three-duties test is the sharpest part of this piece: switch-off authority, budget accountability, and answering for mistakes are usually held by three different people, which is exactly why the owner column stays blank. The ten-minute test turns that into something a team can run without a governance project — three questions, three names, and the split is visible. The switch-it-off-for-a-week check is a blunt but honest way to find out who actually relies on a tool.