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The items generated in the above fashion already have the client SKU mapping done so when the items have been picked they can be sorted based on the external Item Id itself using the below screen.
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Order Consolidation
For multi line items at the sorting step one will have to scan the pigeon hole also to consolidate order line items. The process is as follows:
Scan picklist Id.
Scan client SKU Id.
If external Id mapping is also enabled from the configurations one will have to scan the external Item Id as well.
After that for a multi line order one will have to scan the pigeon hole as well.
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Note: Increff USP is not managing the pigeon holes shown for sorting here but only using them. The Ids and management of the pigeon holes is not being done by Increff USP.