Precision engineering is a form of engineering that make use of ideas from electrical engineering, mechanical engineering, optical engineering, software engineering, and electronic engineering, to analyze and design machines that have a lot of stability and very low tolerance.

Precision engineering works on the fundamental law that system behavior can be predicted no matter the kind of motions involved. To fully understand this, you should know all machines obey Newton’s third law of cause and effect. Anything that happens in a machine is as a result of the effect of something.

This removes probability from machine control. This means everything happening in a machine happens for reasons that can be determined, and these causes can be controlled. Precision engineering makes use of this basis in developing machines with precise movement and improved machine accuracy.

The approaches of precision engineering have been applied in fields like Optoelectronics designs, Machine tools, Nanoelectromechanical systems (NEMS), Microelectromechanical systems (MEM).