Editing Advanced Warship Tutorial (section)

==Fine Tuning==

Now it is time to balance your design. Your Maintenance lifetime should be larger than your deployment time, which should be larger than your days on max power. There is a value 'Max Repair Cost', which is the amount of MSP needed to fix the single most expensive component, your ship should be able to store more MSP than this value, if you want your ship to be able to repair itself.

Also check you have enough power, and look if you are satisfied by the number of missiles you can load. In the ordnance tab (next one to design) you can add a default load out of missiles. Divide the number of missiles by the number of launchers to get the number of salvoes you can fire.
Weight the number of Fire Controls against the number of weapon mounts.
It is a good idea to check the percentage of space different components take up, to see if your ship is balanced.
You can always tweak the size a bit if you need to, but make sure that the ship still does what you need it to do.