In addition, a visual model adds value to the project if it can be leveraged to jumpstart a project task or a future activity such as method evolution, maintenance, knowledge transfer, or training.

另外，如果可视的模型可以用于开始项目的任务或未来的活动，例如方法演进、维护、知识传递，或培训，那么可视的模型就给项目增加了价值。

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This technique works fine if you have a single database maintenance activity within the logical unit of work (LUW).

如果在逻辑工作单元(LUW)中维护一个数据库活动，那么这一技巧将非常有用。

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Ensure that you document the system and perform a mksysb before performing any maintenance activity.

在执行任何维护任务之前，一定要对系统进行文档记录并执行一个mksysb命令。

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On the upstream side, Chevron saw maintenance activity affect both their domestic and international operations.

FORBES: Chevron's Production And Refining Down While Brazil Authorizes Ultra-Deepwater Drilling Again

In the U.S., refinery crude-input volume fell 145, 000 barrels per day to 557 million barrels per day on maintenance activity at its Pascagoula, Mississippi refinery.

FORBES: Chevron's Production And Refining Down While Brazil Authorizes Ultra-Deepwater Drilling Again

In the U.S., Chevron saw net oil equivalent production slide 11, 000 barrels per day to 663 million barrels as a consequence of increased maintenance activity in the Gulf of Mexico.

FORBES: Chevron's Production And Refining Down While Brazil Authorizes Ultra-Deepwater Drilling Again