Start with the process, then connect the systems.

Bring orders from multiple shops into a shared workflow while preserving the originating channel and its order references. Keep inventory allocations explicit instead of assuming every store can sell the entire warehouse balance at once.

Separate eligible lines into warehouse or supplier handoffs, then combine the progress into an understandable order view. A partial shipment remains partial until the remaining quantities are resolved.

Validate the mappings and create the required document before the next operational step. When a later handoff fails, resume from recorded progress rather than recreating the ERP order.

A warehouse might accept an order even when a network response is lost. Record the unknown outcome, reconcile the reference and only retry when doing so is safe.