Leading people and organizations requires more and clearer communication than one would normally deem necessary when implementing change. Sure, your core team is in the know and on board, but what about everyone else? Employees? Stakeholders? Clients? Customers?
The more substantial the change, the more time it takes to communicate and bring people on board. The larger the organization, the more time and effort it takes to communicate. That is why it is critical to communicate early and often.