optimistic estimate

基本解释

You basically take a weighted average of a pessimistic, expected, and optimistic estimate for the activity duration.
你可以通过对最长的活动需时、预期的活动需时、最短的活动需时进行加权平均来估算活动需时。
The proportions have been fixed since 1987 based on an over-optimistic estimate that annual run-off is 58bn cubic metres.
自从1987年以来，基于一个过于乐观的总水量估计（每年580亿立方米），配额都是固定的。
The optimistic estimate is a few days, but the mechanic can't tell us for sure until he spends more time with the RV (much like investigating a defect in our code).
利观的估计是几天，但是直到机械师在 RV 上花费了更多时间，他才能确定的告诉我们（非常像调查代码中的缺陷）需要多长时间。

Goldman Sachs's calculations suggest that, to reduce growth from 4% to 3%, (an optimistic estimate of America's new sustainable growth rate) the financial conditions index would need to increase by 1.25 percentage points.
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Even that is probably a wildly optimistic estimate.
ECONOMIST: China’s private surprise