Centrally controlled supply of construction sites.
A series of similar sites must be supplied from a central warehouse with large parts and assembly parts from both our own production and from suppliers. The construction takes several months and the warehouse at the sites (actually only a few containers) has limited storage space. The first reaction in case of shortages is of course: increasing the site warehouse and installing more security, but when there are a larger number of sites this not only becomes an expensive operation, but also requires more and more administration. You can therefore be almost certain that one site is missing exactly those things, which are in surplus at another, and there we go again!