Unit costs to produce a 787-8 by July will 50% less that the first aircraft delivered to All Nippon Airways less than a year earlier, Boeing chief executive Jim McNerney said

"We will still have planes in modification this summer, but it will be worked down on plan," says McNerney. "By the second half of year, you should notice a significant decline in the number of those planes hanging around." Of the expected 35 to 43 787s to be completed this year, Boeing says more than half will need change incorporations at Boeing's Everett Modification Center. The number is expected to trail off in 2014.

http://www.flightglobal.com/news/articles/boeing-787-unit-costs-to-drop-50-by-summer-371139/