How and who will check whether the physical shipment was made correctly

So who will check the worker in the warehouse, whether he correctly collected the order? Basically it's done like this: An employee collects a bunch of different packages of clothes on order (he walks around the warehouse and collects many different packages in a wheelbarrow - up to 100 pieces - up to 100 pieces. These are different colors and sizes and each package has its own article) If he did not report or put in more, then no one will know about it. Since there is no check at the stage of shipment. Usually this is done with the help of a scanner, you pick the goods and it shows whether the quantity matched, what was superfluous or what was not reported.) Can't check here? Just guess? It's not right - when you just clicked the LOAD button and that's it. Here, no one will ever know whether the quantity was physically shipped correctly. This can only be done with a scanner.