For products, it is possible to make receiving mandatory by selecting "Receiving Requirement" checkbox on the Inventory Model Group.
Is it possible to achieve the same for procurement categories?
Meaning - create a purchase order line, and put on the line only a procurement category without selecting a product, and still make receiving mandatory?
This is standard not possible as the categories represent a "service" without an item. If you place an order for "tv-commercial" you cannot receive it.
In this case you need to create an item. It can be a service item or non-stocked.
Yes, you need to add a rule in your Purchasing policies.(Procurement / Setup / Policies / Purchasing policies)
Thanks Antoine - per your advice I found it on the "Category Policy Rules"
Andre - we are actually planning to use "category" purchasing for tangible items, since we do not keep inventory, and out items are mostly a "one time items".
Are you aware of any constrain that will prevent us from doing so?
Antoine is right. I understood before that this policy setting only was applicable for the products belonging to that category. Just tested and works. Even the three way match!
When using items you have the advantage of using the trade agreements and other product related setup. But as you said most of them are "one time items" the trade agreements is not valid in this case. But you might benefit from standardizing dimensions.
Constraints on using items: setup model groups should be correct.