Much of the work required of a product owner or scrum master is aiming for targets that don’t exist in order to hit the ones that do or the ones they need. Time for a thought experiment. There are many performance metrics available to Agile leaders – sprint velocity, backlog burndown, backlog volatility, effort estimate accuracy, etc. What’s used and how depends on the project and the composition of the team. For the thought experiment, I’ll use velocity.