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[美国国家公共广播] 【整理】NPR 2008-09-03

提高英语听力能力 找对方法很重要!
跟着大家又学到了新的知识,在此表示感谢。下面是在网上找到的,贴出来和大家一起分享。

The Cone of Uncertainty describes the change of uncertainties during a project. It goes back to research done by NASA which came to the conclusion that in the beginning of the project life cycle (i.e. before gathering of requirements) estimations have in general an uncertainty of factor 4. This means that the actual duration can be 4 times or 1/4th of the first estimations.

This factor can be quite different - depending on the character of the project. The more time the project spends on R&I the higher the factor.

The name "Cone of Uncertainty" comes from the initially fast, but later slow decrease of the uncertainty curve. At the beginning of a project, comparatively little is known about the product or work results. As more research and development is done, more information is learned about the project and the uncertainty then tends to decrease, reaching 0% when all residual risk has been terminated or transferred. This usually happens by the end of the project i.e. by transferring the responsibilities to a separate maintenance group.

The term Cone of Uncertainty comes from software development where the technical and business environments change very rapidly. Two geeks in a garage may redefine the business (ref: Apple Inc., Google). Most environments change so slowly that they can be considered static for the duration of a typical project, and traditional project management methods therefore focus on achieving a full understanding of the environment through careful analysis and planning. Well before any significant investments are made, the uncertainty is reduced to a level where the risk can be carried comfortably. In this kind of environment the uncertainty level decreases rapidly in the beginning and the cone shape is less obvious. The software business however is very volatile and there is an external pressure to increase the uncertainty level over time. The project must actively and continuously work to reduce the uncertainty level.

When things do not go your way, God has a plan for you.

谢谢大家,有一个衍生问题。

原帖由 playstation 于 2008-9-4 13:35 发表 第一个你说的是Traffic Cone吧。41594wiki上提到有很多别的名称:Traffic cones, also called toddlers, road cones, safety cones, construction cones, pylons, or Witches' Hats, are cone-shaped markers, gener ...

 

感谢playstation! 谢谢您的解答。也谢谢后面两位斑斑的指点。长知识了!

 

再问个问题行不?问题比较多 那么那种路上常见的三角型的指示牌在英语有没有什么idiomatic的说法呢?还是就只用traffic sign一种说法呢?谢谢大家!

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原帖由 Chloé 于 2008-9-5 14:11 发表   感谢playstation! 谢谢您的解答。也谢谢后面两位斑斑的指点。长知识了!   再问个问题行不?问题比较多 那么那种路上常见的三角型的指示牌在英语有没有什么idiomatic的说法呢?还是就只用traf ...


最常用就是traffic signroad sign,当然各种形状都有triangular/rectangular /diamond shaped /round
还有些是说明指示牌的类型,比如warning sign、regulatory sign、guide sign、mandatory sign等等。
或者直接指明标牌内容的,诸如:yield sign、stop sign、GIVE WAY sign、speed limit sign、one-way sign


1

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  • goanna

实现无障碍英语沟通

原帖由 playstation 于 2008-9-5 14:43 发表 最常用就是traffic sign和road sign,当然各种形状都有triangular/rectangular /diamond shaped /round还有些是说明指示牌的类型,比如warning sign、regulatory sign、guide sign、mandatory sign等等。或者直接指明 ...

 

 

snx very much!

never have i heard of that! 

snx again!

[ 本帖最后由 Chloé 于 2008-9-5 15:01 编辑 ]
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