Tasks

Tasks are the basic elements of BPMN processes — atomic units of work composed to create a meaningful result. When a token arrives at a task, execution pauses until the work is completed; the token then continues along the outgoing sequence flow. The granularity of a task depends on the process design — a step can be modeled as a single task or split into several smaller tasks.

Key characteristics

• One incoming and one outgoing sequence flow.
• Represents a single, atomic unit of work.
• Can define input and output parameter mappings between the process and the task.
• Errors during execution can be handled using boundary events.

Types

Green icons are supported and link to their documentation.

Task	Icon	Description
Service task		Work performed automatically by a system, without human involvement. It automates process steps by invoking external services, APIs, or backend systems.
User task		Work performed by a human. It suspends process execution until a user completes the task and provides input or makes a decision.
Business rule task		Provides a mechanism for invoking business rules, delegating complex decision logic to rule engines.
Send task		Sends a defined message and immediately continues execution without waiting for a response.
Receive task		Pauses the process and waits until a specific named message is received, then continues execution.