Fixed Assets are assets that depreciate with a constant on the books. They are physically present on the place. For example a Production machine in Manufacture is a fixed asset. A house is fixed asset. They don't move by themselves unless you move them physically from where they were to another location and for this reason either they have a serial number to track them; or if they don't, they must be tag with a number that tells you where to located them. The depreciation should be constant without fluctuations because of the market.