Hi Kaushik,
Reuse via Linked Processes is possible today. Documentation on how to create and use linked processes can be found here:
https://www.blueworkslive.com/scr/docs/bwl/topics/activities.html#sub_linked_processesAs for the requirement to reuse other kinds of artifacts, there is your open idea here:
https://dba.ideas.ibm.com/ideas/BWL1-I-587Hopefully others will see this post and vote! The more interest there is in a feature, the greater the likelihood of it happening :-)
Best regards,
------------------------------
Suzette Samoojh
------------------------------