Different Aspect's of Termination of Employment

AfricaPay.org is a great website!! It's definitely worth checking out. It has all these different answers to personal questions coming from employers.

Under the law, there are four grounds which layout the rules for a termination of an employee, which I got from AfricaPay.org (2012). These include:

• Misconduct- If an employee behaves badly, or is involved with a certain action, they can be fired. I would say, that things such as inappropriate language, turning up at work with an unprofessional attitude, thing's like that would be defined as "misconduct."
• Incapacity- If the employee cannot keep up with what is being required, or isn't physically capable of doing a certain job, an employer has the right to fire the employee.
• Incompatibility- If an employer or employee cannot meet each others requirement, I would say that an employer would be able to fire someone. Although I found this was the hardest one to explain, because "incompatibility" can be seen from many angles. If for example the employer has something against the employee that is personal, I would say that it is not allowed to fire them and the employee would be able to sue. (I need to research a bit more on this!)
• Employer's operational requirements- This goes back to point number two, if there are certain requirement that the employer needs, and the employee cannot meet them, then that basically means the employee doesn't have the qualification for that specific job. 

The writing in orange, is my personal interpretation of these four ground limits. I'm curious.. what do you think they mean?