The Checklist Wizard is required primarily for the support of the helpdesk employee who has to get the correct information from the End USer calling in with a concern. In case this user wants to log an RFC, you can assign the checklist in the Service Call module itself. For the change module, usually only those changes are added directly to it, which are pre-planned changes or emergency changes. In both these cases, the information required (ideally) should not need a checklist, hence the provision for a checklist is not there in Change module.
If there is an external command that can be used to launch the Checklist wizard (which I so far don't know of, any other insight will be great), you can use that with a Smart Action.
Hope this helps....
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