There are several different depreciation methods other than straight-line depreciation which is used by Delta Airlines and Singapore Airlines. Like residual value and depreciable life, depreciation method requires management judgment.
Research accelerated depreciation and explain when accelerated depreciation would be appropriate. [this is meant to be one question; the following questions are designed to help your thought process in forming your answer.] Would it be appropriate for Delta Airlines or Singapore Airlines? What industries would be appropriate for accelerated depreciation methods, and why?