What must be completed for an action to display in Tempo?

For an action to display in Tempo, it is essential that it is defined within the application. This involves creating the action and ensuring it is appropriately configured as part of the Appian application design. Defining an action includes setting up its behavior, control mechanisms, and any associated process models or interfaces that it may trigger when executed.

This definition is crucial because Tempo, which is the user interface for accessing application actions, needs a clear and structured definition of what the action is and how it functions within the broader context of the application. If an action is not defined, it will not have the necessary details or classification to be recognized and displayed in the Tempo environment, thus making it inaccessible to users.

The other options, while relevant to aspects of Appian applications, do not directly contribute to whether an action will appear in Tempo. For example, simply publishing a process model or an application does not suffice without the defined action, and having all process variables set pertains more to the execution of processes rather than the visibility of actions within the Tempo interface.