In his Forbes article How do you change an organisational culture? Steve Dennings points out that:
… an organization’s culture comprises an interlocking set of goals, roles, processes, values, communications practices, attitudes and assumptions.
The elements fit together as a mutually reinforcing system and combine to prevent any attempt to change it.
He lists a suite of change tools to be deployed as leadership, management, power. The chart below is a re-draw of Dennings’ tools for organisational change. It works well as a roadmap, and as a toolkit for managing bumps in the road for change programs: