The asset is therefore key to perform the service and caterers usually maintain reserve trolley equipment
(buffer stock). Airlines must therefore carry more equipment than should be necessary to operate, which
increases inventory cost.
Inventory counts are not accurate, often done manually, and it is difficult to identify precisely where trolleys
are worldwide. Trolleys go missing and need to be replaced; it can also be necessary to truck trolleys
between kitchens to deal with equipment unbalances.