The official milestones, as given in the Management Plan, are listed below.

Kick-Off 04 June 2004
ESO Council Approval 23 May 2005
Preliminary Design Review 11 May 2006
Final Design Review 24 April 2008
Test Readiness Review November 2010
Preliminary Acceptance Review in Europe March 2011
Provisional Acceptance in Chile September 2011
 
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