As part of a Team Charter it's helpful to have an "Operations Manual" explaining how various ceremonies are done, etc.
Here's a starting point for agile teams working in one week sprints with a heavy amount of ad-hoc requests which would otherwise be handled via a kanban system:
- Thursday afternoons and Monday morning for 1 hr (adjust frequency and timing based on team’s requirements)
- PO brings new stories to the team in this time
- Team discusses the top of the backlog trying to get 1-2 sprints worth of tickets into a “Ready” state (see “Definition of Ready” below)