Model element: Type Design
In order to improve a type of thing, one must have a means of reliably producing such a thing, and this usually means having the instructions needed to produce or replicate it. For biological organisms, this is the genome. For a software application, it is the source code. For an airplane, this is a large collection of design documents, such as drawings and parts lists (or 3-D models). For a nation, it is a constitution.
Note that a type design must always be specified using a known type design language.