Which typically results from the introduction of the assembly line into the production process?

The answer is "efficiency is increased".

An assembly line is a manufacturing process in which compatible parts are added to an item in a successive way to make a final result. Much of the time, an assembling mechanical production system is a semi-mechanized framework through which an item moves. At each station along the line some piece of the generation procedure happens. The laborers and hardware used to create the thing are stationary along the line and the item travels through the cycle, from beginning to end.