In Technical design, a overall drawing is the representation of a mechanism complete (or partial) making it possible to locate each part which composes it. The parts are drawn, full-scale, preferably on the scale 1:1, their exact position (assemblies), which makes it possible to have a concrete idea of the operation of the mechanism.

A overall drawing is generally accompanied by a Nomenclature proposing a designation by each part, its matter, its number of occurrence, its process of development and possibly of internal information to the company.

The software of design (CAD) allows today the automatic edition of this document starting from the voluminal definition of the assemblies. The design software (Drawing computer-assisted) offers possibilities of easier recoveries and filings definitely simplified.

More than the representation of the technical Systems, the overall drawing is a tool allowing on paper the validation of technological solutions (problems of assembly, obstruction, interferences…).

The design drawings of the parts are then extracted starting from this document. What explains the use of the copies (this term being even taken again to him in CAD).

The drawing of assembly is an overall drawing showing all the parts and groups of a completely assembled product, and which will allow the correct realization of the assembly (Vue in burst).

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