Why do Companies hire a Consultant

Have you ever thought through the reasons why companies hire a consultant? There are many reasons, however it also requires the company to be ready to take the guidance given and implement it. Not just top-down, but with buy-in from the entire company.
The article below takes you through some of the reasons companies actually hire a consultant.
https://www.themuse.com/advice/good-to-know-why-companies-really-hire-consultants