Start Events

Start Events define where a Process begins.

When you add a Start Event to a diagram, make sure:

• It has no incoming Sequence Flows.

• It has at least one outgoing Sequence Flow.

• It has no outgoing Message Flows.

Start Events appear as circles with a thin edge. The marker changes according to the type of Start Event.

Start Event

A Start Event marks the beginning of a Process.

Start Event Attributes

You’ll find Start Event attributes and other settings within the Attributes panel, under the Attributes tab and other tabs.

Message Start Event

A Message Start Event starts a Process when a message is received from another participant.

Message Start Event attributes

You’ll find Message Start Event attributes and other settings within the Attributes panel, under the Attributes tab and other tabs.

Signal Start Event

A Signal Start Event starts a Process when a signal is broadcast by another process. A signal is an event that is broadcast to everyone involved in a process.

Signal Start Event attributes

You’ll find Signal Start Event attributes and other settings within the Attributes panel, under the Attributes tab and other tabs.

Timer Start Event

A Timer Start Event enables you to control the start of a Process using a time condition. Use it to trigger a process at a specific date and time or at defined intervals.

Timer Start Event attributes

You’ll find Timer Start Event attributes and other settings within the Attributes panel, under the Attributes tab and other tabs.