Answer:
Specialization
Step-by-step explanation:
The concept of specialization is to divide the work that must be done into simple parts in which each employee (or a group of them) can focus, make themselves specialists on it, and improve their performance in that tasks. This way, employees can focus in only a simple task, make themselves experts, not worry about something else or something they are not fit for, and then, if every employee does the same in their part, the collective work improves.
It is a concept introduced by Taylor to improve efficiency and has been used for more than 100 years, with excelent results.