Precision engineering is an engineering discipline which is a sub-discipline of electronics engineering, optical engineering, software engineering, mechanical engineering, and electrical engineering.
The discipline of precision engineering relates to the designing of machines, fixtures and other structures that possess tolerances on an exceptionally low level.
This is where the precision is required to work at extremely low tolerance, and create near-perfect models. These kinds of design approaches are adopted in machine tools, micro-electromechanical systems, optoelectronics and nano-electromechanical systems design, as well as various other fields.