Some employees are going to leave, whatever you do, and you may not want to keep an employee who’s causing trouble, but many valuable employees quit for reasons that you can do something about. That’s why spotting trouble ahead of time is so important; if you can predict who might leave, you may get the chance to convince them to stay.

Here are four types of employees who may need some extra attention to keep them around:

Employees going through a personal crisis or other significant personal event may be re-evaluating their jobs alongside the rest of their lives, according to When I Work. While they may simply find themselves hankering for a promotion, they may also find themselves wanting a new day-to-day routine, which could mean you lose a valuable employee.

When I Work recommends giving such employees time to de-stress. Showing an employee in such a situation that you are aware of their needs can go a long way. If you really don’t want to lose them, you may want to give them the opportunity for a new role in the company.

Similarly, employees who feel undervalued–those who were expecting a raise and didn’t get it, or who were passed over for a promotion–may be contemplating leaving. They may start looking elsewhere and showing reduced interest in and focus on the task at hand. Sometimes such employees have already moved on in their minds; they’re just biding their time until a better opportunity arises.

If this is an employee you want to keep, consider if you are willing to give them what they want. Of course, you first need to know what it is that they feel is missing. Keeping in touch with the professional desires of your employees will help to minimize the possibility of them looking for something new.

Related to the point above, even a talented employee may consider quitting if they feel like they’re overworked. Forbes warns that you may lose people if “you’ve overloaded your best people with too many responsibilities.” Knowing whether your employees have too much to do and not enough time to do it can be challenging; asking employees and paying attention to workflow can help, though.

While some employees may take advantage of your concern and exaggerate their stress, others will appreciate your interest. You probably know your best employees well enough that you can tell if they are telling the truth.

If an employee is displaying apathy toward their work and their peers, it’s a pretty good sign that they are halfway out the door. They may be acting this way for various reasons. As When I Work notes, a personal event may have caused this, but it’s also likely that a change at the company has caused their disengagement.

Annoyances caused by fellow employees or new policies that make your employees’ jobs more difficult can precipitate such a change. Forbes says that a new hire may cause disruption in the office that you don’t notice because you get along with them. Employees may notice incompetence or problematic personality traits before you do.

Some of these traits can be detected by paying close attention to how your employees are working and interacting; you can also find out more about how your employees are, based on responses to evaluations.

With the right tools, you’ll be able to learn more about how an employee feels about their work, and potentially address an issue before it arises. This is where 360 degree software can help you retain your best employees.

Grapevine Evaluations provides easily customizable online 360 degree software that can provide crucial feedback about employees from everyone they work with, including themselves. To learn more about how our 360 degree feedback can help your company, or to set up a one-on-one demo, contact Grapevine Evaluations today.