The limit of internal recruitment is ().

The phenomenon of "inbreeding" is most likely to occur in internal recruitment. Employees in the same organization have the same cultural background, which may lead to the phenomenon of "group thinking" and inhibit individual innovation. Especially when the important positions in the organization are mainly promoted by grass-roots employees step by step, a rigid thinking consciousness may be gradually generated due to the lack of new people and new ideas, which is not conducive to the long-term development of the organization. ABC is a restriction on external recruitment.