On-Call Scheduling subflows

Release version: Australia

Updated March 12, 2026

1 minute to read

Subflows in On-Call Scheduling enable you to build and configure on-call escalation notification flows.

Using subflows for on-call escalation

A subflow is an automated process consisting of a sequence of reusable actions, data inputs, and outputs. In contrast to flows, subflows do not have a trigger but instead run when called from a flow, from another subflow, or from a script. Compared to workflows, subflows enables you to easily configure channels, and notification and response messages. Maintain, build, and modify your own custom on-call scheduling flows in Workflow Studio with subflows for new instances. The following subflows are available with On-call:

On-Call: Assign
On-Call: Assign and Notify
On-Call: Assign by Acknowledgment
On-Call: Assign by Acknowledgement per Rota
On-Call: Assign by Acknowledgement Voice
On-Call: Check Assignment Response
On-Call: Conference Call Escalation
On-Call: Escalations by Email
On-Call: Escalation By Email per Rota
On-Call: Time-off approval

Using Workflow Studio, you can build and configure various components such as subflow inputs, outputs, actions, and flow variables such as escalation levels. You can use the contextual comments in the flow designer to help you configure the subflows. For more information on building and configuring subflows in Workflow Studio, see

Workflow Studio

Subflows activation and uses

Starting from the Zurich release, for the zBoot or new users, On-Call Scheduling uses subflows and workflows are no longer supported.

For existing or upgrade users, in Zurich, your current workflows continue to be supported along with the subflows.

With the migration from legacy workflow to subflows, each workflow has a corresponding subflow with similar name and functional capabilities.

To activate the subflows, you must navigate to All > On-Call Scheduling > Administration > Trigger Rules and select the subflow for a trigger rule to activate and use the subflow. For more information, see Create an escalation trigger rule.

For using subflows in Service Operations Workspace (SOW), SOW version must be 8.0 or later.