It’s a fact of business life: Employees aren’t likely to stay in one job forever. Something might happen to prompt them to start looking for a new opportunity and, regardless of what you might to do try and retain them, they leave and the company has to find someone new.
Employee retention is a challenge for all companies, and for managers in particular. Finding, hiring and keeping great employees is an ongoing process and one which deserves adequate attention and care to do correctly.
It costs more than just time to replace an employee