The three outbound errors and what causes each
A shipping error is always one of three, and they do not start in the same place.
The wrong product leaves when the picking location holds similar items side by side, or when the line is picked from memory. The wrong quantity appears when the order is counted once, by the same person who picked it. Both start in picking.
The wrong destination is a different case: the order is complete and correct, but it goes on the wrong truck or carries the label of the order next to it. That error almost always starts in staging.
That sets the order of the project: if the first two dominate, the work goes into picking; if the third dominates, STOKA redesigns staging, defines the verification rule, and writes the loading procedure.
What shipping is measured by, and with what formula
These are the four numbers that track an outbound operation, each with its formula. None of them carries a target value: what is acceptable depends on the delivery window your company committed to and on the type of order.
Orders with claims: customer claims divided by orders shipped over the same period, broken down by missing item, wrong product, and wrong destination.
Loading time per truck: minutes between the start of loading and the signature on the packing slip, measured by shift, because a monthly average hides the peak.
Orders outside the window: orders shipped after the committed delivery window divided by orders shipped.
Staging rework: cartons sent back from staging to picking divided by cartons staged. This last one is measured inside the warehouse, before the error leaves the building.