Your question is a bit vague, but if you are talking about Dynamics CRM workflows through the editor, the workflow runtime will be the runtime.
To get this, follow these steps -
- As part of the workflow, in the create or update step, click in the date / time field on the form.
- In the "Form Helper" box on the right, open "Access the Process drop-down menu.
- Set the drop-down list to "Runtime"
- Click Add
- Click OK
This will cause the current workflow to be started in the form field. Screenshot below -

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