Meaning
An accounting method calculates the loss of asset value based on the actual usage of the machinery rather than the passage of time. Under units of production depreciation, the annual expense charged to the income statement rises and falls in direct proportion to the number of battery cells produced by the equipment. This approach is highly effective for specialized manufacturing assets like high-speed electrode slitting machines whose wear is driven entirely by physical operation.
Activity Measurement
Determining the depreciation charge per unit requires dividing the total capital cost of the machine, minus its residual salvage value, by the total lifetime output it is rated to produce. This rate is then multiplied by the actual output achieved during the fiscal year. In years of low production activity, the depreciation expense drops, which helps to preserve the factory’s operating margins.
Wear Pattern
Matching the expense to the physical wear of the machine ensures that the carrying value on the balance sheet reflects its remaining productive capability. This prevents overstating asset values.
Financial Accrual
Implementing this method requires accurate tracking of machine output metrics through digital sensors integrated into the manufacturing line. This prevents disputes with auditors regarding the estimated remaining lifetime of the asset. The detailed logs provide a clear, verifiable record that justifies the depreciation rates used in the financial statements.
