A reusable sub-process is a stand-alone process that can be reused in the same main process or in several different main processes to avoid creating the same process several times. It can also be used independently.

The sub-process is modeled as a regular process, see section Model a process and its subsections. The sub-process can then be linked to a call activity in a main process.

In the Included/referring processes tab in the process's attribute form, it shows whether the process is used as a reusable sub-process or has included sub-processes.