Many items that you or your family purchase were created on assembly lines to lower the cost of production and ultimately the price you had to pay.
Cars are probably the best example.
The car assembly line is much more sophisticated today, with robots performing dangerous and undesirable tasks such as welding or painting. CD players, in-line skates, and denim jeans are all examples of items made affordable through assembly line manufacturing. Assembly of Titan IV rockets, unmanned space launch vehicles. One way you hope manufacturing engineering never affects you is in the medical field. In one application, a medical imaging system is linked with a rapid prototyping system to produce a physical model of a patient's brain.