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Total addressable market (TAM), also called total available market, is a term that is typically used to reference the revenue opportunity available for a product or service. TAM helps to prioritize business opportunities by serving as a quick metric of the underlying potential of a given opportunity.〔Steve Blank and Bob Dorf, ''The Startup Owner's Manual'', K & S Ranch, first edition (March 1, 2012), ISBN 978-0984999309〕 One approach is to estimate how much of the market any company can gain if there were no competitors. A more encompassing variation is to estimate the market size that could theoretically be served with a specific product or service. TAM can be defined as a global total (even if a specific company could not reach some of it) or, more commonly, as a market that one specific company could serve (within realistic expansion scenarios). This focuses strategic marketing and sales efforts and addresses actual customer needs. The inclusion of constraints such as competition and distribution challenges then modifies the strategy to frame it with realistic boundaries, reducing the market down to the serviceable available market (SAM), the percentage of the market that can actually be served (either by that company or all providers) out of the TAM.〔 == Difference between TAM, SAM and SOM == Total Addressable market (TAM), or Total Available Market, is the total market demand for a product or service, calculated in annual revenue or unite sales if 100% of available market is achieved. Serviceable Available Market (SAM), is the portion of TAM targeted and served by your products or services.〔 Serviceable Obtainable Market (SOM), or Share of Market, is the percentage of SAM which is realistically reached.〔 For example, the total UK consumer expenditure on food in 2014, which is the Total Addressable Market of food market is £198 billion(including catering, alcoholic drinks, non-alcoholic drinks and other foods ). The Serviceable Available Market for alcoholic drinks, which producers of alcoholic drinks target and serve is £49 billion.〔 Since the market for alcoholic drinks is not monopoly, the Share of Market for a company producing alcoholic drinks can never reach 100% of SAM. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Total addressable market」の詳細全文を読む スポンサード リンク
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