Change and transition are often used as a synonym. To me the word Transition describes better that it is a change in time.
- A transition is a structural change, resulting from developments in the field economics, culture technology, etc [..] (Source: Wikipedia)
- A change process through which the structure of a system (society, region, sector, organisation, etc.) changes profoundly as a result of technological, economical, ecological causes [..] (Source: kennisconsult.nl)
In short, you move (in a structured fashion) from A to B. With a clear goal in mind. (Covey: “begin with the end in mind”)