它是通过估算公司价值中无法用当前产品和现金流来解释的部分来计算的。
It is calculated by estimating the share of a company's value that cannot be accounted for by its current products and cash flow.
要计算这样的估算准确率，团队必须要耗费精力获得详细的“实际”工作小时数，我可从没有见过哪个敏捷实践倡议说要这样做。
To calculate this kind of estimate accuracy, teams would have to expend effort to capture detailed "actual" hours, a practice not advocated by any Agile approach I've seen.
同样，预付实例能帮助云计算供应商估算容量，并最大地降低耗尽资源或过多占用未使用实例的风险。
Similarly, prepaid instances help the cloud computing provider estimate capacity and minimize the on-demand risk of running out of resources or sitting on too many unused instances.
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