What German yards needed to build H-class battleships

How much would a naval yard need to change to move from Scharnhorst-class to H-class battleship construction?

It would need coordinated upgrades to manufacturing, support, slipway size, and structural capacity for the heavier ship.

No single change turns a Scharnhorst-capable yard into an H-class builder. The yard needs greater manufacturing capacity for the larger ship and a support system able to sustain the more demanding build. Slipway dimensions and the structures carrying the hull must also accommodate the increase in size and weight. Each modification may appear modest in isolation, but all of them have to meet a high standard before construction can proceed safely and efficiently.