Cross sub-functional learning

Any HR function in a new age company is fragmented into sub-functions like recruitment,career planning,man power allocation,exit mgmt,process/line HR,training etc.

This categorisation provides a better visible structure to HR but I feel if a proper 'cross sub functional learning' is not done among associates within HR domain then it might lead to de-limiting of learning within the domain.

For example; Once a year; let a specific HR team in your company do recruitment of a particular batch followed by the orientation,training,compensation mgmt,performance appraisal of the same batch so that the HR team can understand the sub-functions clearly and it would also serve the purpose of recognizing the 'ownership' tagged with the concerned batch of employees.