inbound IDoc serialization

Dear all,

I have a requirement to serialize IDocs that PI creates in the ERP system. By this I mean not only that the IDocs are sent to the ERP system in the order that they were received on PI, but also that the ERP system makes sure that each IDoc is processed one after the other.

What steps are required on PI and ERP to achieve this? Can it in this scenario also happen that locks on the business object occur? If so, do we have to plan any reports that reprocess failed IDocs? Or is this not applicable for EOIO queues?