For example, there are 2 lathes with data, and the depreciation period refers to electronic products (3 years); 5 mechanical lathes. Depreciation life refers to machinery and other production equipment (10 year).
Average depreciation period =(2*3+5* 10)/(2+5)=8 years.
However, this method has a disadvantage, that is, if the subsequent maintenance and update expenses of the data lathe meet the capitalization conditions (extending the service life for more than 2 years or increasing the original value by more than 50%), it will be troublesome to re-verify the service life or recalculate the depreciation, and it is necessary to restore the net value of fixed assets calculated according to the average service life to the original value, and then recalculate the subsequent depreciation amount.
Therefore, if the depreciation period of fixed assets is not uniform, the best way is to make separate provision.