Requirements-first design versus fixed constraints

The ideal naval-architecture sequence begins by deciding a ship's duties, equipment, crew, range, and speed, then designing the hull around those requirements. This approach can produce a more expensive ship, but one better matched to its service and more likely to remain useful for a long career. In the more common fixed-criteria process, treaty tonnage, price, yard limits, or dry-dock size come first. Designers must then remove capability, accept risk, misstate displacement, or persuade decision-makers to invest in larger infrastructure. A recurring estimate that the unconstrained answer may be roughly twenty percent larger shows how a modest limit can reshape an entire warship. The modern Queen Elizabeth class and the CVA-01 studies make the infrastructure constraint concrete: a larger carrier required Britain to fund additional shipbuilding capacity first.