Final answer:
Functional turnover refers to the type of turnover where part-time, poor performers leave and the company gains from their departure instead of being hurt by it.
Step-by-step explanation:
In the context of employee turnover, when part-time, poor performers leave and the company is not hurt by their departure and gains from it, this turnover can be categorized as functional turnover. Functional turnover refers to the type of turnover that actually benefits the organization by removing employees who are not performing well and replacing them with more competent individuals. In this case, the company benefits from the departure of poor performers because it creates an opportunity to bring in better talent.