The English system of manufacturing
was an early system of industrial production that required skilled machinists who were required to produce parts from a design or model. But however skilled the machinist, parts were never absolutely identical, and each part had to be manufactured separately to fit its counterpart. This was almost always done by one person who produced the completed item from start to finish.
The growth of the use of Interchangeable parts and mass production led to the system disappearing from mainstream industry.