Fixed assets are initially recognized at historical cost. After initial recognition,
companies choose either the cost model or the revaluation model for each class of them.
Under the cost model, assets are carried at cost after the deduction of any accumulated
depreciation and any accumulated impairmentlosses. Under the revaluation model,
assets are regularly updated at fair value and subsequentdepreciation and impairment
losses are based on the revalued amount at the date of revaluation.