I am assuming that you are looking the steps to schedule a .qvf to get imported .If so, its not possible in qliksense so far.
And if you are looking the steps to schedule a qvf refresh.If so, follow these steps:
1) Import your app into QMC using the apps tab. If you have multiple files like an Extraction,Transformation and Load files. Import them as well.
2) Now go to the tasks tab and create a new task.
3) If you have 3 files (E, T & L) then you need to schedule the Extraction at a desired time and then create dependent takes for the transformation and Load files as required.
4) Once you are happy with the dashboard and confident that it can be published, go to the apps tab, select your app and publish it to the stream required.
Also These video here should be very help full in achieving this: