Yes, your ERP remains the source of truth.
We have built ChemCloud to work around ERP software - so Purchase Orders, Inwards Goods all still happens in your ERP. Anything procurement-related you do in email, a spreadsheet or on SharePoint - that is what ChemCloud replaces.
We have seen many customers go through ERP migrations, and we wouldn't wish it on anyone. We can integrate with whatever ERP you are using.