I think that very different numbering is to make sure customers don't pick up the wrong box. They seem to put very different numbers next to each other in the warehouse.
Assuming that all warehouses are the same size and shape and carry the same things, which is why they instead use Local bin numbers.
Works a lot like an IP and MAC I suppose.
Items in the warehouse go through many coordinates during manufacture, shipment, merchandiser, etc. before going out to the parking lot with a customer.
The part number is for accounting.
It allows allocation of expenses such as raw materials in a meaningful way.
Kinda like that (maybe false?) story about the Stalin solving a problem during WWII involving same-diameter mortar shells and rockets getting mixed up in logistical orders (so, your unit needs mortar shells, but you receive rockets, and vice versa) by dictating that one be re-labeled with an incorrect (but unique!) diameter. Make it different enough that even a partial or partially-understood name is unlikely to be mistaken for something else.
The world war two sherman tank originally had a 75 mm gun, later this was upgraded to a 76 mm high velocity gun. The interesting thing is that the 76 mm gun was actually 75mm, the army used the 76mm designation because the ammo was incompatible and they wanted to avoid exactly the sort of problems you would have if you had to deliver ammo for two different 75 mm guns.
