Activities
BPMN Activities
In BPMN, activities represent the core units of work in a process. They are the actions that must be performed to move the process forward — whether by a user, a system, or another process.
Activities are what you’re trying to get done in a business process, and they come in different forms to suit different types of work.
Tasks
A Task is the simplest kind of activity — a single unit of work. It might represent a user filling out a form, a system sending an email, or a service making an API call.
Subprocesses
A Subprocess is a collection of steps grouped into a reusable process block. It can be used to organize complex workflows or isolate logic that’s used in multiple places.
→ Learn more about Subprocesses
Call Activities
A Call Activity is a special kind of activity that calls another reusable process — either from within the same model or from another one. This is useful for creating modular, maintainable process architectures.
→ Learn more about Call Activities
Activity Markings
Multi-Instance Activities
Sometimes a task or subprocess needs to be repeated — for example, sending an approval request to multiple users or processing a list of items, where the task or subprocess should be repeated once for each item in the list. BPMN handles this using multi-instance activities, which let you loop over a collection or repeat an activity multiple times, sequentially or in parallel.