Every improvement is a change, but not every change is an improvement. Basically, change can be brought about by two ways.
A “Command and Control” change comes down from the top, and is “sold” to the lower ranking members of the organization, often accompanied by a new software implementation
At various levels people don’t know how what they are doing is essential to the organization, and don’t know what their colleagues are doing and how that is essential to the organization. This becomes resistance to change, and hampers improvement.
On the other hand, effective change is often brought around by Consensus, Communication Collaboration and Commitment. The 4C’s of system improvement.
When people can answer the questions: “Why Change?”, "What to Change?”, “What to Change To?” and “How to Make the Change?”, they “Buy In” to the solution, and help its success