In Service Studio you can expose process activities owned by your eSpace to be used by a different one. In this context, the eSpaces are called a Producer and Consumer, respectively.
Expose your process activity to allow Consumer eSpaces to manage the exposed process activity through process activity System actions.
Exposed process activities are not to be reused when defining process flows in Consumer eSpaces.
The process activities that can be exposed are: Human Activity, Wait, and Conditional Start.
How to Expose a Process Activity
In the Producer eSpace, set the Public property of your process activity to Yes and publish the eSpace. How?
When a process activity is exposed its process must also be exposed.
You cannot expose a process activity of your eSpace when:
Your eSpace is multi-tenant.
In this situation, an error message is presented and the eSpace is not valid.
Use Process Activity References | Expose a Process