There are several advantages of relying on internal recruitment sources.

One advantage is that it is usually less expensive to recruit from internal sources than it is to recruit from external sources.

Another advantage is that internal candidates are usually more familiar with the company's culture and values, and therefore may be more likely to be successful in the role.

Additionally, internal candidates may have a better understanding of the company's systems and processes, which can make the transition to a new role easier. Finally, recruiting from internal sources can help to build a sense of loyalty and commitment among employees, as they feel that the company is invested in their development and career growth.