Briefly explain any three demerits of external sources of recruitment

Briefly explain any three demerits of external sources of recruitment.
or
External sources of recruitment are time consuming than internal sources. Do you agree?

Demerits of external sources of recruitment :
(i) Dissatisfaction among existing staff Recruitment from external sources may create dissatisfaction among the existing staff as their chances of promotion are reduced.
(ii) Lengthy process Recruitfnent from external sources involves a lot of time and efforts of the manager.
(iii) Costly process Recruitment from external sources involves a lot of expenditure on advertising, selection and other processes.