It can therefore be said that every warehousing process comprises the six aforementioned sub-processes divided into three groups of activities:
- activities “before” the warehouse (origin of the goods)
- activities “in” the warehouse
- activities “after” the warehouse (destination of the goods)
Translating the colloquial “something” into concepts related to warehouse logistics, we should determine what is actually stored in warehouses. The first reaction is the statement that materials, articles, products, goods, assortments, etc. are stored in the warehouse. The Polish language is very rich, so these concepts could be developed further, saying that semi-finished products, prefabricated parts, raw materials, material items, etc. are also stored. It will not be a groundbreaking statement that all the above-mentioned concepts are blurred from the logistics point of view, none of them has logistic attributes. It is true, however, that specific assortments are stored in the warehouse, but in fact, they are not the ones that matter to the warehouse keeper. Indeed, the warehouse keeper operates with packages, boxes, trays, barrels, coils, packaging, bags, pallets, etc., meaning they use identifiable logistic items whose contents are of secondary importance during warehouse operations.