When I am building ships quickly I try to use planetary industry to build some of the big ticket items so that the ship construction time is reduced. This ends up being a bit of a pain a lot of times as I am building x engines, y turrets, etc. If we could have some means of putting together several items in a package and selecting the package to be built instead of the individual items it would help. For example a recent cruiser I built had 4 engines, 3 heavy laser turrets, 4 point defense turrets and 4 different fire controls. If all of this could be combined into CA1 package it would make using the planetary industry to speed up ship construction much easier.
As a note by prefabricating much of a ships components I was able to take a 30,000 ton ship with a nominal 23 month build time and instead have it finished in 5 months. Better than 4 times as fast, which can be a big advantage in an emergency.
Brian