I have no knowledge and experience in depth about why my answer is approximate, I hope someone clarifies better than me.
It should be to use a "skeleton" or an "external" reference system to the part (or parts) that through the generation of a series of basic geometries such as planes, point lines (or even more complex) allows to easily control and modify all the parts contained in the axieme that bind with the skeleton. reference geometries to be better used can be "published"
to make a concrete example:
to realize an electro-welded structure on which models are screwed and referred, can be set as follows:
the project head generates a set in which it inserts a "skeleton" part that contains the wireframe of the frame i.e. the useful lines and plans that pass through the center of the tubes and define the maximum size,
the amount and position of reinforcements, the position of the support plates of the various models etc.
another designer (or the same) using these references creates and binds the details that constitute the actual frame (e.g. profiled in square iron of 80 thickness 3mm, plates thickness 12 mm etc.) and other designers are responsible for making the various models that are attached to it above.. .
if during the development of the project it is necessary to reduce (or increase) the size of the frame, it is sufficient to intervene on the skeleton and the connected parts resize accordingly.
It is quite obvious that modifying pipe for pipe and plate is much longer than acting on wireframe geometries that are at the origin of it
the skeleton is reusable for a different project where perhaps the picture profile should be reduced from 80 to 50 or to adapt to different dimensions
