I need to do some more research, but part of the particular problem here was the transition to detailed design. First, the USCG had a bunch of changes in the 'accepted' design that they said were required (location of the DC deck, for example). However, the big problem seems to be the transition to detailed design- i.e. how do we actually build this thing. I think it is the GAO report which talks about the angles, supports, and thickness of the hull making it too hard for welders to actually build the ship, along with a general unfamiliarity and lack of experience with the EQ 47 steel alloy used for hull construction.
One HUGE part of cost overruns; changes to the design after construction has begun.
I need to do some more research, but part of the particular problem here was the transition to detailed design. First, the USCG had a bunch of changes in the 'accepted' design that they said were required (location of the DC deck, for example). However, the big problem seems to be the transition to detailed design- i.e. how do we actually build this thing. I think it is the GAO report which talks about the angles, supports, and thickness of the hull making it too hard for welders to actually build the ship, along with a general unfamiliarity and lack of experience with the EQ 47 steel alloy used for hull construction.
I definitely want to hear more about the 40% increase in lightship displacement.