Initiate approval workflow after "on edit --> on success"

Initiate approval workflow after "on edit --> on success"

Dear Community, 

currently I am working on a initiative tracker which should handle approval workflows based on different initiative status. As far as I understand, an approval workflow can be triggered (only?) when data is entered for the input form to the database. 

Example:
A new initiative is created and submitted. --> Approval Workflow triggered

Here comes my question:
Is it also possible to trigger an approval workflow if the form was "simply" updated?
(on edit --> on success)

Imagine the initiative status is changed from idea to Calculated and the responsible stakeholder has to approve the corresponding adjustments. Unfortunately, i cannot find any solution yet which triggers an workflow once the form is simply changed.

I hope you can help me out with this problem / request.
Thank you so much in advance.