As with any work activity it is recommended that the recruitment and induction process be reviewed for its effectiveness. If any stage of the recruitment process failed to produce the expected result, eg if the advertising method has produced too many candidates, you may want to examine what happened and why in order to make it more efficient in the future. Future recruitment exercises may require modifications to the methods used - a successful recruitment for one job does not automatically mean the same method will be as successful again. This is particularly true if the labour market changes, with, for instance, fewer school leavers but more mature workers being available.
Recruitment and induction may be a continuous process in your organisation, necessitating more or less constant monitoring.
Monitoring regularly will also ensure equal opportunity policies are being actively pursued, and that internal candidates are receiving the same consideration as external candidates.