When the stakeholders have completed prioritisation of stories and assigned them to a sprint, and the team has agreed that the sprint is achievable, how is or how can the sprint be "locked down" so that stakeholders can't sneak in new stories to an in-progress sprint?
I imagine this is doable with permissions (e.g. not giving out Schedule Issues permission) but that prevents stakeholders prioritising all the time, including during sprint planning. Of course there is always the possibility that a critical bug will emerge requiring priority implementation without a full sprint restart, so it should be possible to update an in-progress sprint, but under the control of the Scrum Master.
Have I missed something in GreenHopper, or are permissions the only (system) way?
Thanks