Obsolescence of a depreciable assets may be caused by:
(a) Technological changes
(b) Improvement in Production method
(c) Legal or other restrictions
(d) Change in market demand for the product or service output

Question

Obsolescence of a depreciable assets may be caused by: 
(a) Technological changes 
(b) Improvement in Production method 
(c) Legal or other restrictions 
(d) Change in market demand for the product or service output

Accepted Answer

The correct option is 4:
Obsolescence refers to the loss of value of a depreciable asset due to factors other than physical wear and tear; specifically, it is the process of becoming outdated or inadequate. This form of depreciation is broadly classified into functional obsolescence (internal to the asset's design) and economic/external obsolescence (external to the asset). Options (a) Technological changes and (b) Improvement in Production method are core examples of **functional obsolescence**, as they introduce superior alternatives that make the existing asset less efficient or more costly to operate compared to modern equipment. Options (c) Legal or other restrictions and (d) Change in market demand for the final product represent **economic/external obsolescence**. New government regulations (c), such as environmental standards, can prohibit or restrict the use of an asset, while a significant drop in market demand (d) for the product the asset manufactures makes the asset economically redundant. Since all four listed factors are recognized, valid causes that can render a depreciable asset obsolete, the most comprehensive and correct option is the one that includes all of them.

The incorrect option is 1:
Selecting only (a) is insufficient because it narrowly focuses on technological changes while ignoring other important drivers of obsolescence. An asset can become obsolete even if its technology is relatively stable, simply because an entirely new production method (b) emerges that is dramatically more cost-effective, which is a key form of functional obsolescence. Furthermore, this option omits external factors like new government regulations (c) or a major shift in consumer demand (d), which can instantly destroy an asset's economic viability regardless of its internal technology.

The incorrect option is 2:
This option limits the causes of obsolescence only to (a) Technological changes and (b) Improvement in Production method, which solely cover the internal or *functional* aspects of obsolescence. However, an asset's loss of value is also powerfully driven by *external* or *economic* factors, which are completely missed here. For example, if the demand for the final product vanishes (d), the asset becomes obsolete even if it is technically perfect and efficiently operated. The choice is incomplete as it ignores the influence of market and legal environments.

The incorrect option is 3:
This option, which includes (a), (b), and (c), is incorrect because it still omits the crucial external factor of (d) Change in market demand for the product or service output. If the market for the product manufactured by the asset collapses due to substitutes or changing consumer tastes, the asset is no longer needed, and its value drops immediately—a clear case of economic obsolescence. Since obsolescence is an economic concept reflecting the loss of utility, excluding the primary economic driver of demand changes makes this selection incomplete and therefore incorrect.