Framework PO : Continously add lines, or create a new PO number every X amount of years?

[Oscar_DC]

Hi all,

My current company uses a fair quantity of framework PO's with item category B, Unknown account assignment, and no validity dates on them.

The business units have been using the same Purchase Order numbers since 2007. Whenever they have exceeded the limit on the Purchase Order item, they create a new requisition (with a custom document type), the requisition goes through approval, and then purchasing creates a new line item for that Purchase Order.

These Purchase Orders do not have any formal contract or agreement behind them.

As a result, I have Purchase Orders with more than 40 items on them and they all have item category B and unknown account assignment.

I want to provide purchasing with good reasons to periodically create Purchase Orders instead of just constantly adding lines to them.

Here are my reasons for suggesting this:

1. There is no standard way of automatically adding line items to an existing Purchase Order. Buyers would have to manually add lines to an existing Purchase Order. Any automatic requisition to PO conversion cannot take place.
2. The only way for the buyer to know which Purchase Order to add PO lines to is to read at a note in the requisition text.
3. The validity dates at the header of the PO cannot be used, or must be constantly modified to ensure that the PO's are still valid.
4. Accounts payable needs to deal with a large number of PO lines instead of just one. Each time that they need to post an invoice against the PO Item, they must select a specific item

How do you deal with framework Purchase Orders ? Do you let folks just add line items to them? or do you create new Purchase Orders every X number of years? Do you have any more reasons to create new PO numbers?

Thanks!