What is the primary purpose of job specialization

The answer to the question: What is the primary purpose of job specialization, would be, to increase the focus, and increase the abilities, of a worker on a specific task, or topic, to maximize his/her performance, and increase his/her expertise, on a specific field of knowledge.

Explanation:

Job specialization, or what we now call specialization, period, is a means by which a person places all of his/her efforts and focus on learning and honing the necessary skills, knowledge and abilities needed to perform the tasks of that particular field. This tendency began with the Industrial Revolutions, as technology and knowledge, especially scientific, advanced more and more, and the branches of knowledge on each field expanded further and further. The problem with it is that now people on single field may be so specialized on specific branches of that field, that they may have forgotten that there are other parts to their chosen field.

answer; randomized controlled trials;