Why do companies like to invite external consultants to complete consulting work?

For this problem, our consultant thinks: firstly, it is because the human resources manager in the enterprise can't finish the work objectively and fairly. This is mainly because the human resources department is generally equal to other departments. It is difficult to express professional opinions on business.

Secondly, the information is insufficient and relatively closed. Human resource consultants in enterprises cannot understand market information. Therefore, there are restrictions on professionalism.

Finally, they can't study theories and methods in depth. Because they are busy with the daily administrative work within the enterprise, they have little time to analyze and study the relevant theories, so it is difficult to understand them as thoroughly as professional consultants.