Service item

Hi Gurus,

We are having intersting scenario.

We we need to create order which conists of three line items.

1. Company material

2. material from a third party vendor.

3. service item from a third party vendor(who does the assembly of 1 and 2 line item).

So we need to have all the three line items in one order where in line item 2 and 3 has to create PR and then PO.

Please tell me is it possible make the service item as a third party item such that it should create PR and PO.

Note that iam trying the same by copying TAS item category but while creating order for the service item it is throwing error message "No account determined for consumtpion account).

Please give me some suggestion.

Regards,

Babs