Turnover often is classified as voluntary or involuntary. The involuntary turnover occurs when an employee is fired. Voluntary turnover occurs
when an employee leaves by choice and can be caused by many factors. Causes include lack of challenge, better opportunity elsewhere, pay, supervision, geography, and pressure. Certainly, not all turnover is negative. Some workforce losses are quite desirable, especially if those workers who leave are lower-performing, less reliable individuals.