… find out what does and what doesn’t work in your context. So no “big bang”, but “inspect & adapt”. By dealing with the changes team by team, you will be slowly permeating the old organization, until you reach a critical mass and “the others” will be forced to join the change. Be patient: it can take months or years for the culture of an organization to transform.
…ve a sponsor from senior management, who can join the team regularly and take away any impediments. Structural impediments do not disappear by themselves, it costs time to solve the issue properly. T-team members must have sufficient time available to make this happen.