You can process multiple deliveries for picking and PGI using shipment idoc SHPMNT05 /SHPCON.You need to create shipment for the required deliveries and generate output put message based on shipment.
In SHPMNT05 Idoc you can assign number of deliveries and you can do pick and PGI.
Using the delivery qualifier E1EDL18 with below filed you can do PGI.
| CHG | Change delivery (inbound) | |
| DEL | Delete delivery (inbound and outbound) | |
| PGI | Post delivery goods issue (inbound) | |
| ORI | Original message (inbound and outbound) | |
| CHA | Change message (outbound) | |
| GWT | Change gross weight (inbound) | |
| NWT | Change net weight (inbound) | |
| VOL | Change volume (inbound) |
| PIC | Picking with flow records (inbound) |
| JIT | Summarized JIT call |
| PID | Primary identification |
| INC | Include delivery in standard tour |
| REP | Replace delivery, unconfirmed (inbound and outbound) |
| RPA | Replace delivery confirmed (outbound) |
| RPR | Replace delivery rejected (outbound) |
| RPA | Replace delivery confirmed (outbound) | |
| RPR | Replace delivery rejected (outbound) | |
| ORA | Create delivery confirmed (outbound) | |
| ORR | Create delivery rejected (outbound) | |
| DLA | Delete delivery confirmed (outbound) | |
| DLR | Create delivery rejected (outbound) | |
| CWV | Transfer gross weight, net weight, and volume (inbound) | |
| ______________________________ | __________ | ____________________________________________________________ |