With an iterative, incremental lifecycle, the slip may be in functionality and not in the date delivered.

使用迭代递增的生命周期，这种偏离将会是功能性方面的，而不会在交付日期上发生。

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The second slip-up some men make on a date is one of the worst mistakes a man can ever make.

第二个男人在约会时所犯的失误是男人所犯下的错误中最糟糕的一个。

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Reaching for thewrong lab slip, writing the incorrect date on a medical chart.

拿错化验单，在病历上写错日期。

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And despite the occasional slip of a date reference from various executives, an official ship date still hasn't been set.

CNN: Some see ploy in Microsoft NT rename

Heroic pronouncements like the one above, which would seem to raise the specter of failure and impel employees forward, perversely do just the opposite: they incent employees to lobby to lower the bar and slip the delivery date.

FORBES: We Never Fail

RKA, having still had no money from the government, quietly allowed the launch date of the service module to slip from April to December of 1998.

ECONOMIST: Rocket science