Concept:Depreciation methods allocate the cost of a fixed asset over its useful life.
Obsolescence is a cause of depreciation, not a method of calculating it.
Explanation:The recognised methods of depreciating fixed assets include Straight Line, Diminishing (Reducing) Balance, Revaluation, Sum of Years Digits, and Units of Production.
Now, compare each option with this list.
Option A, Revaluation, is an accepted method of depreciation.
Option B, Straight Line, is one of the most common depreciation methods.
Option C, Diminishing balance, is also a valid depreciation method.
Option D, Obsolescence, is not a method of depreciation.
Obsolescence means a fixed asset loses value because it becomes outdated due to technological change or reduced demand.
It explains why depreciation is necessary, but it is not a technique used to compute depreciation.
Therefore, the correct answer is the one that is not a depreciation method.
Answer:Option D. Obsolescence