How a warship changes from sketch to construction

How closely do design sketches, detailed plans, and the completed ship match?

The build follows the detailed design much more closely than the initial sketch, but practical discoveries and changing requirements still force alterations.

A sketch is an outline rather than a final specification. Detailed design adds the arrangements and engineering needed to build, but even that cannot predict every interference, requirement change, or equipment substitution discovered in the yard. The completed ship should resemble the detailed design more than the sketch while still recording construction-era compromises.