Something from many, many years ago.
Ships are rated as follows, a-a-a attack factors for spinal - bays - missiles, and d-d-d for armour-screens-point defence and jump number
Start with a TL9 and factors of 3-3-3/3-3-3 J1 for a BB. For heavy cruisers 2-2-2/2-2-2 J1, and other cruisers/escorts at 1-1-1/1-1-1 And then use the same TL based increases and points swapping mentioned earlier (based on HG80 breakpoints). You can lower one factor (including jump number) to increase one of the others, you can also reduce a factor by1 to gain 1 squadron of fighters.
Jump number above 3 comes with a cost - jump 4 you must reduce 2 factors, jump 5 costs you 4 factors, and jump 6 costs 6 factors.
For attack and defence factors there are several TL break points, above TL9 add 1 to the initial factor as follows..
Attack
+1 TL11
+2 TL13
+3 TL15
Defence
+1 TL10
+2 TL12
+3 TL14
Factors can also be reassigned to cover things like carrying battle riders, carrying fuel/drop tanks, carrying troops and their vehicles...