This machine industry traditionally belongs to the heavy industry. Nowadays, many smaller companies in this branch are considered part of the light industry. Most manufacturers in the machinery industry
These means of production are called capital goods, because a certain amount of capital is invested. Much of those production machines require regular maintenance, which becomes supplied specialized companies in the machine industry.
On the other end the machinery industry supplies consumer goods, including kitchen appliances, refrigerators, washers, dryers and a like. Production of radio and television, however, is generally considered belonging to the electrical equipment industry. The machinery industry itself is a major customer of the steel industry.
The production of the machinery industry varies widely from single-unit production and series production to mass production. Single-unit production is about constructing unique products, which are specified in specific customer requirements. Due to modular design such devices and machines can often be manufactured in small series, which significantly reduces the costs. From a certain stage in the production, the specific customer requirements are build in, and the unique product is created.
ARTICLES SOURCES : https://en.wikipedia.org/wiki/Machine_industry