There are a variety of ways in which a build can be triggered for a plan:

• Code updated — a build can be triggered whenever one or more authors checks-in code.
• Scheduled build — a build can be scheduled to occur at regular intervals.
• Dependency — a build can be triggered whenever a successful build occurs for another plan.
• Manual build — a build can be triggered manually.
• Initial clean build — a build will be triggered when a new plan is created.

The way in which each build was triggered is listed in the 'Reason' column on the Dashboard.