Definition:
Enterprise Transition Community (ETC) is a small group in an organisation that supports the initiatives, efforts to introduce and improve Scrum. It exists to create a culture and environment where change can be released by members who are passionate about the success of the organisation. The acronym ETC is consistently used by Ken Schwaber in “The Enterprise in Scrum”.
It does this by not imposing changes but by guiding groups who are implementing changes, by removing obstacles, by creating energy and excitement for the change. The members of ETC are not more than a dozen but comes from the highest level involved in the transition to Scrum. If the company is adopting Scrum organisation-wide, the ETC should include senior people from Engineering, Development, VPs where the key is that ETC is made up of most senior people for the level at which transition is happening.
Further Reading:
Book: SUCCEEDING WITH AGILE Software Development Using Scrum by Mike Cohn