Goal
A multi-step process requires filling out several sub forms in steps in order to complete a complex task. It should be clear at any time at which step of the process the user is. It should also be possible to return to a previous step and change data entered there.
Note that the steps of a multi-step process follow each other. This is not the same as breaking up a complex form into individual sub forms, as the steps usually linearily depend on each other.