WordNet

the property of being out of date and not current (同)superannuation

PrepTutorEJDIC

(言葉・習慣などが)すたれた / 時代遅れの,旧式の(our of date)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/06/11 11:31:02」(JST)

wiki en

[Wiki en表示]

Look up obsolescence or obsolete in Wiktionary, the free dictionary.

Ending the Depression Through Planned Obsolescence by Bernard London, 1932

Obsolescence is the state of being which occurs when an object, service, or practice is no longer wanted even though it may still be in good working order. Obsolescence frequently occurs because a replacement has become available that has, in sum, more advantages than the inconvenience related to repurchasing the replacement. Obsolete refers to something that is already disused or discarded, or antiquated.^[1] Typically, obsolescence is preceded by a gradual decline in popularity.

Consequences

Driven by rapid technological changes, new components are developed and launched on the market with increasing speed. The result is a dramatic change in production methods of all components and their market availability. A growing industry sector is facing issues where life cycles of products no longer fit together with life cycles of required components. This issue is known as obsolescence, the status given to a part when it is no longer available from its original manufacturer. The problem of obsolescence is most prevalent for electronics technology, wherein the procurement lifetimes for microelectronic parts are often significantly shorter than the manufacturing and support life cycles for the products that use the parts. However, obsolescence extends beyond electronic components to other items, such as materials, textiles, and mechanical parts. In addition, obsolescence has been shown to appear for software, specifications, standards, processes, and soft resources, such as human skills. It is highly important to implement and operate an active management of obsolescence to mitigate and avoid extreme costs.^[2]^[3]

Types

Technical obsolescence

Technical obsolescence usually occurs when a new product or technology supersedes the old, and it becomes preferred to use the new technology in place of the old, even if the old product is still functional. Historical examples of superseding technologies causing obsolescence include higher-quality multimedia DVD over videocassette recorder and the telephone, with audio transmission, over the telegraph's coded electrical signals. On a smaller scale, particular products may become obsolete due to replacement by a newer version of the product. Many products in the computer industry become obsolete in this manner; for example, Central processing units frequently become obsolete in favor of newer, faster units. Singularly, rapid obsolescence of data formats along with their supporting hardware and software can lead to loss of critical information, a process known as digital obsolescence.

Another complementary reason for obsolescence can be that supporting technologies may no longer be available to produce or even repair a product. For example many integrated circuits, including CPUs, memory and even some relatively simple logic chips may no longer be produced because the technology has been superseded, their original developer has gone out of business or a competitor has bought them out and effectively killed off their products to remove competition. It is rarely worth redeveloping a product to get around these issues since its overall functionality and price/performance ratio has usually been superseded by that time as well.^[4]

Some products are rendered technologically obsolete due to changes in complementary products which results in the function of the first product being made unnecessary. For example, buggy whips became obsolete when people started to travel in cars rather than in horse-drawn buggies.

Functional obsolescence

Particular items may become functionally obsolete when they do not function in the manner that they did when they were created. This may be due to natural wear, or due to some intervening act. For example, if a new mobile phone technology is adopted, and there is no longer a provider who provides service based on the old technology, any mobile phone using that technology would be rendered obsolete due to the inability to access service.

Products which naturally wear out or break down may become obsolete if replacement parts are no longer available, or when the cost of repairs or replacement parts is higher than the cost of a new item. A product may intentionally be designed to use a faster wearing component, a form of planned obsolescence.

Planned obsolescence

Sometimes marketers deliberately introduce obsolescence into their product strategy, with the objective of generating long-term sales volume by reducing the time between repeat purchases. One example might be producing an appliance which is deliberately designed to wear out within five years of its purchase, pushing consumers to replace it within five years.

Style obsolescence

Jimi Hendrix's bell-bottoms

When a product is no longer desirable because it has gone out of the popular fashion, its style is obsolete. One example is flared leg jeans; although this article of clothing may still be perfectly functional, it is no longer desirable because style trends have moved away from the flared leg cut.

Because of the "fashion cycle", stylistically obsolete products may eventually regain popularity and cease to be obsolete. A current example is "acid-wash" jeans, which were popular in the 1980s, became stylistically obsolete in the mid to late 1990s, and returned to popularity in the 2000s.

Postponement obsolescence

Postponement obsolescence refers to a situation where technological improvements are not introduced to a product, even though they could be. One possible example is when an auto manufacturer develops a new feature for its line of cars, but chooses not to implement that feature in the production of the least expensive car in its product line.

Obsolescence management

Obsolescence management, also referred to as "Diminishing Manufacturing Sources and Material Shortages (DMSMS) is defined as to the activities that are undertaken to mitigate the effects of obsolescence. Activities can include last-time buys, life-time buys, and obsolescence monitoring.^[5]

References

^ Fowler HW and Fowler FG (1st ed.), Thompson Delia (ed.) (1995). The Concise Oxford Dictionary of Current English, 9th Ed., Clarendon Press, Oxford. ISBN 0-19-861319-9.
^ Bjoern Bartels, Ulrich Ermel, Peter Sandborn and Michael G. Pecht (2012). Strategies to the Prediction, Mitigation and Management of Product Obsolescence, 1st. Ed., John Wiley & Sons, Inc., Hoboken, New Jerseey. ISBN 1-11-814064-8 .
^ "ABSC GmbH Obsolescence Management Solutions". Absc.de. Retrieved 2012-07-15.
^ "Example manufacturer's obsolescence notifications". Ab.com. Retrieved 2012-07-15.
^ "Example of a manufacturer's obsolescence notifications web page". Ab.com. Retrieved 2012-07-15.

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 睡眠障害の分類 classification of sleep disorders
2. レジオネラ感染の治療および予防 treatment and prevention of legionella infection
3. 早期乳癌に対する乳房および胸壁照射の合併症 complications of breast and chest wall irradiation for early stage breast cancer
4. 遺伝コプロポルフィリン症 hereditary coproporphyria
5. 異型ポルフィリン症 variegate porphyria

English Journal

Using an algorithmic approach to secondary amenorrhea: Avoiding diagnostic error.

Roberts-Wilson TK, Spencer JB, Fantz CR.SourceDepartment of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, United States. Electronic address: tkrober@emory.edu.
Clinica chimica acta; international journal of clinical chemistry.Clin Chim Acta.2013 Aug 23;423:56-61. doi: 10.1016/j.cca.2013.04.007. Epub 2013 Apr 12.
Secondary amenorrhea in women of reproductive age may be an indication of an undiagnosed, chronic condition and appropriate treatment is dependent upon accurate diagnosis of the underlying etiology. A thorough clinical assessment and a few common laboratory tests can easily identify the most frequen
PMID 23588065

Real-time PCR method for the detection of the gene encoding surface lipoprotein LipL32 of pathogenic Leptospira: use in the laboratory diagnosis of the acute form of leptospirosis.

Cermakova Z, Kucerova P, Pliskova L, Kubickova P.SourceFrom the 1 Department of Clinical Microbiology, Charles University in Prague, Faculty of Medicine in Hradec Kralove and University Hospital Hradec Kralove , Hradec Kralove.
Scandinavian journal of infectious diseases.Scand J Infect Dis.2013 Aug;45(8):593-9. doi: 10.3109/00365548.2013.795656.
Abstract Background: The aims of this work were to replace the obsolete PCR method for the laboratory diagnosis of the acute form of leptospirosis using the G1, G2 and B64 I, B64 II primers, and to improve the PCR detection time. Methods: We introduced a real-time PCR method for the detection of the
PMID 23848450

E-waste bans and U.S. households' preferences for disposing of their e-waste.

Milovantseva N, Saphores JD.SourceDepartment of Electronic & Computer Engineering, University of Limerick, Limerick, Ireland. Natalia.Milovantseva@ul.ie
Journal of environmental management.J Environ Manage.2013 Jul 30;124:8-16. doi: 10.1016/j.jenvman.2013.03.019. Epub 2013 Apr 18.
To deal with the inadequate disposal of e-waste, many states have instituted bans on its disposal in municipal landfills. However, the effectiveness of e-waste bans does not seem to have been analyzed yet. This paper starts addressing this gap. Using data from a survey of U.S. households, we estimat
PMID 23603771

Japanese Journal

緊急対応期における保健医療分野の救援活動と後方支援体制のあり方について

上原鳴夫
保健医療科学 62(4), 382-389, 2013-08-00
東日本大震災のもっとも重要な教訓は,災害関連法と地域防災計画のベースになっている災害の基本認識と災害対応の枠組みが,基礎自治体で対応可能な局地的災害を前提としており,今回の災害や予測される南海トラフ地震のような広域大規模災害を想定した救援の備えがなかったことである.各県で進められている災害対応計画の見直しも,従来の認識と枠組みの中での改訂にとどまるかぎり,同じ悲劇が繰り返されるものと懸念される.広 …
NAID 110009623895

R&Dケイパビリティの学習プロセスに関する実証研究 : 日本医薬品メーカーを例に

柴田聡,王疆
日本経営学会誌 (31), 15-26, 2013-06-15
… Among our findings, the paper concludes that firm's investment decision based on historical capability will be risky, since without continuing investment in R&D, firm's capability will be obsolete in very short time. …
NAID 110009612500

Parallel Worlds : Formal Structures and Informal Mechanisms of Postwar Soviet Mathematics(<Special Issue>Science and Soviet Political Authorities: Conflict, Cooperation, and Incongruence)

GEROVITCH Slava
Historia scientiarum. Second series : international journal of the History of Science Society of Japan 22(3), 181-200, 2013-03-31
… Restrictions on foreign travel, limited access to foreign literature, obsessive secrecy regulations, an obsolete university curriculum, the declining level of the faculty, discriminatory policies in university admissions and employment, and limitations on physical access to universities and research institutions - all these factors worked against the creation of a fully functional research community. …
NAID 110009597333