For example, the cost, effort, and duration of a project are at best educated guesses.
例如，最好也不过是有根据地推测项目的成本、工作及持续时间。
In every case, however, the duration of a project is finite. Projects are not ongoing efforts.
然而，在任何情况下项目的期限都是有限的，项目不是持续不断的努力。
Therefore, any potential higher, up-front costs are more easily recovered over the duration of a project (see Sidebar).
因此，在项目过程中，任何可能更高的、预先的成本都更容易回收（参见工具条）。
The assumption that the duration of a project and the whole project's finishing time is random and submitted to some kinds of probability distribution is the theoretical basis of the PERT.
PERT的理论基础是假设项目持续时间以及整个项目的完成时间是随机的，且服从某种概率分布。
Smaller companies are viewed as riskier partners that are vulnerable to the loss of key personnel and "may not have the financial muscle to survive for the duration of a project," the authors said.
小公司容易被视作危险的合作者,因为他们很容易流失核心技术人员,还可能"缺乏足够的经济力量以在项目的开发周期中生存下来,"这位官员还说。
Now, consider how a project manager sets the duration of tasks in a project plan.
现在，考虑项目经理如何设置项目计划中的任务持续时间。
Those in our industry understand how difficult it is to accurately determine up front the exact scope, cost, or duration of a significant project.
这让我们知道，在我们行业中准确地制定一个重大项目功能范围，价格或者时间是非常困难的。
Many project managers have different "rules of thumb" for the maximum duration of any one task, but a common one is that most tasks should not exceed two weeks.
对于任一任务的最大持续时间，许多项目经理都有不同的经验，但一般而言，大多数任务都不应超过两周。
Cost itself may be a product of other factors, including the project duration, resources, and environment.
费用本身也可能是产品的其它要素，包括产品工期，资源环境等。
Large project: Has a budget over $500,000, a team size of thirteen or greater, and a duration of more than a year.
大型项目：预算超过$500,000，团队规模为十三人或者更大，项目进行时间超过一年。
With that in mind a project plan was defined with an estimated duration of six days.
这样，一个项目计划就在六天之内被制定出来了。
Medium project: Has a budget of $100,000-$500,000, a team size of six to twelve, and a duration of six months to a year.
中等项目：预算$100,000-$500,000，团队规模为六到十二人，项目进行时间为六个月到一年。
Project 2007 USES this calendar to schedule tasks that do not have resources assigned, or for tasks that have a task type of fixed duration.
Project 2007使用项目日历去排定没有资源分配的任务的日程，或者类型为固定工期的任务的日程。
The objective of fast tracking a project is to: Increase productivity. Reduce project duration. Increase schedule tracking controls.
项目快速跟进的目标是：提高生产效率减少项目历时提高进度跟踪控制降低项目风险。
The optimal size of resource is, therefore, defined as the minimum size of resource required to keep the project duration a minimum.
最佳大小的资源，所以被界定为最小尺寸的资源必须保持项目持续时间减少到最低限度。
The aggregate production systems at the Three Gorges project, should meet requirements for the concrete placement of stage -I works, with a huge volume and a long construction duration.
三峡工程第二阶段混凝土浇筑量大且持续时间长，混凝土骨料生产供应必须满足混凝土浇筑的要求。
A random variation of size of resources and its effect on project duration, queue length and percentage utilization is highly desirable and deserves attention from the researchers.
一个随机变化的规模，资源及对工程的影响时间之长，排队的长度和百分比的使用率是非常可取的和值得重视的，由研究员。
Duration of Initial Contract :One year with a 1-month-probation period. Renewable according to project period.
初步合同时长：一年合同，连带一个月试用期；根据项目期限更新合同。
As compared with common power materials, materials for electric power capital construction are characterized by use for a given project, press of time, short duration in storage, etc.
电力基建物资与一般电力物资相比，具有一次专用性强、时间要求快、库存时间短等特点。
The methods of identifying critical chain with the goals of minimum project duration and duration-cost tradeoff are put forward. Finally a scheduling example is given to prove the methods' validity.
然后，以工期最小为目标与工期-成本权衡目标建立关键链识别方法模型，并通过算例验证了该方法的有效性。
The project has an expected duration of 9 months and a 12-month extension option.
项目预计持续9个月，另有一年备选延期。
This is a very simple and useful method in practice because it is not necessary to asunune a distribution of the project duration.
该方法不需要对各工作延续时间的分布作出假定，因此具有广泛的实用性。
Schedule development can require the review and revision of duration estimates and resource estimates to create an approved project schedule that can serve as a baseline to (75) progress.
制订进度过程要求对历时估算和资源估算进行评审和修订，从而产生一个经过认可的项目进度作为对项目进展进行追踪的基准。
Schedule development can require the review and revision of duration estimates and resource estimates to create an approved project schedule that can serve as a baseline to (75) progress.
制订进度过程要求对历时估算和资源估算进行评审和修订，从而产生一个经过认可的项目进度作为对项目进展进行追踪的基准。
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