二、何为性价比

2.2 何为性价比

In economics and engineering, the price–performance ratio refers to a product’s ability to deliver performance, of any sort, for its price. Generally speaking, products with a lower price/performance ratio are more desirable, excluding other factors.
Price–performance is often written as cost–performance or cost–benefit. Even though this term would seem to be a straightforward ratio, when price performance is improved, better, or increased, it actually refers to the performance divided by the price, in other words exactly the opposite ratio (i.e. an inverse ratio) to rank a product as having an increased price/performance.
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