Involves measuring depreciation by looking at comparable properties or income loss from rental or lease properties
Indirect methods
Measured by the differences in selling prices of similar assets with and without the deficiency or other cause of depreciation
Market comparison
Income loss due to the cause of depreciation
Capitalization
Involve measuring the depreciation of the subject property directly
Direct methods
Also known as a straight line method
Economic age life method
Breakdown method requires a separation of elements of accrued depreciation into various categories
Observed condition