Cross-team collaboration
To accelerate software delivery, you want your teams to be as autonomous as possible. The ability to deliver value to your end users at any time without dependencies on other teams is one of the biggest influences on velocity, and yet you need some alignment across teams: design, security, and architecture are some shared concerns that must be addressed across team boundaries. Good cross-team collaboration is a sign of healthy alignment across the teams.
Good cross-team collaboration should not need the involvement of management, usually going up and down the command chain to the first shared manager. Good cross-team collaboration is based on asynchronous workflows that directly get the right people together to solve issues. The fewer meetings that are needed for daily work, the better.