Hi Lavi,
Patrizia has already responded on inputs required for the Unconstrained heuristic in terms of Master Data and Input Key figures. Thanks Patrizia!
In addition, If you are not modeling any capacity you don't need to model Source Production, Production Source Item (BOM), Production Resource master data types and associated key figures such as PCAPASUPPLY, PCAPACONSUMPTIONRATE.
You can also just advance copy delivered SAP4 supply planning model and use this model.
Hope this helps.
Thanks,
Pramod