The duties and responsibilities of a factory worker vary depending on the purpose of the factory. As a factory worker, you take part in at least one aspect of the manufacturing or production process. The different steps needed to produce a product are collectively called a production line. A factory worker may use machinery or perform manual tasks as part of the line. Some factory workers monitor output, pack or sort finished products, or assess the quality of manufactured goods. You may also be trained to do multiple jobs on the line.