What are the types of depreciation methods?

In financial accounting there are three types of depreciation methods:

Straight-line = (cost-residual value)/useful life. This method is used when the asset generates revenues that are equal (or very close to equal) over its useful life.

Diminishing balance = (cost-accumulated depreciation)*depreciation rate. This method is used when the asset's revenues decrease over its useful life.

Units of production = (cost-residual value)*units used /total life units. This method is used when an asset generates revenues based on its measurable usage.