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IDoc message type PROACT
From SAP Knowledge Base
The PROACT is the IDoc message type for stocks and requirements data in an SAP. The outbound IDoc can be used to transmit data to a supplier for VMI (Vendor Managed Inventory / SMI (Supplier Managed Inventory).
General
Message type: PROACT
Basic type: PROACT01
Direction: In & Out
Creation
Outbound
There are different programs to create IDocs for VMI / SMI e.g. SE38 program "RWVMIPAD". In case you want to create own PROACT IDocs with standard fm's, you can use "VMI_MASTERIDOC_CREATE_PROACT" to create the structure of the IDoc and "MASTER_IDOC_DISTRIBUTE" to create the IDoc.
Inbound
With processcode for inbound which contains the fm "IDOC_INPUT_PROACT" you can process inbound IDocs with type PROCACT in case you maintained the entry in WE20.