5. When might a company decide that it needs to hire a human resource professional?

See Below

Explanation:

Below are a few reasons why a business might consider hiring a trained HR officer

It is recommended to hire a Human resource specialist once a company has 50 employees and above. When a business has over 50 employees, it needs someone trained to manage their welfare and other human resources issues.

When a company is growing or expanding rapidly, it requires to employ more people.  No matter the size of a business, when a business is hiring people frequently, it needs an HR officer to coordinate the recruitment process.

If a manager spends over 3 hours a day handling employee issues, then it's time to employ a trained HR officer. This gives the manager time to focus on their core mandate.  A dedicated specialist will be best suited to address employee issues, which is beneficial to both the company and the employees.