The four methods for calculating depreciation allowable under GAAP include straight-line, declining balance, sum-of-the-years' digits, and units of production. The best method for a business ...

Microsoft Excel has built-in functions for multiple depreciation ... balance accelerated method (DDB function), variable declining balance method (VDB function), and units of production method ...

This straight-line depreciation method evenly distributes ... that wear out based on production levels, like machinery that depreciates based on hours used or units produced.