This May 2011 slide from a U.S. DOD/DOT&E brief makes for an interesting companion to the recent F-35 problems leaked to the public.
(click image to make larger)
Interesting: even in March 2011, the expectation was to start pilot training by the end of 2011. We all know how that turned out.
In a short time, the estimate of when full-rate production would start slipped 3 years.
Historically for the F-35 program, slips are now a form of routine.