I've built drill ships with the Koreans. A team of engineers comes into your office and a few weeks later leaves with a complete design. There may be some changes made but those come easy at not too big a price if they are not major and no other changes are made or things have to be undone to get them accomplished.
Vs a warship, I doubt a drill ship is any or much less complicated. On time and on budget delivered without too much fanfare. Most of our problems were with third party supplied drilling equipment and not marine systems.
Not only drill ships but Floating Storage Offloading and Production systems as well. Usually on time and on budget. The things are more like floating refineries.
There was a time when US shipyards could crank out Liberty ships by the day and destroyers by the week. NO computers at all. Just dedicated people who knew what they were doing and a Navy that did the same and let it happen.
Just about nothing happens in this country well any longer. The US is a loser and so is Del Toro, so is the Navy. It is not hard at all to find anything wrong in this country. The nearly impossible challenge is to find anything right.
https://en.wikipedia.org/wiki/Carlos_Del_Toro
Blessed is the nation whose god is the Lord.