For the payment intervals, it would be good to be able to maintain the amounts for each interval.
Example of annual obligations:
1st year €1000
2nd year €2000
3rd year €5000
Currently, these values have to be changed every year and the forecast cannot be determined optimally.
I think the payment plan could be implemented like this, showing the payment plan somewhere on the dialog (maybe on the tab-control) and use index-cards to store the data.

Addional question: Should it be part of every obligation or is it relevant only for the contract overall?
This is allready part of the roadmap, but until now not planned for the next version. Is this as important as the Obligation Managemenet for Contract Lifecylce Management we are already developing?