Engineering Economics
The estimate based on a detailed quantity survey and furnishes the most accurate and reliable estimate possible is known as

Definitive estimate
Probabilistic estimate
None of these
Conceptual estimate

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Engineering Economics
Perfect monopoly exists only if:

the single vendor gets the absolute franchise of the product
the single vendor can prevent the entry of all other vendors in the market
the single vendor is the only one who has the permit to sell
the single vendor is the only one who has the knowledge of the product

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