求翻译：如果要得到最优的解决方案，需要测算多种可能的压缩组合。进行工期压缩时，首先要再次检查现有的作业计划，以及在不增加直接成本的前提下，可能节约的工期目标。是什么意思？

If you want to get the optimal solution, the estimated range of possible compression combination. The duration of compression, we must first examine the existing operating plan, and the premise does not increase in direct costs, potential savings for the duration of the target.

If you want to be the most optimal solution, there is a need to measure more than one possible combination of compression. Deadlines for compression, the first thing to check for existing jobs again, and do not increase in direct cost savings, the goal may be.

If must obtain the most superior solution, needs to survey many kinds of possible compression combination.When carries on the time limit for a project compression, first must inspect the existing work plan once more, as well as in does not increase the direct cost under the premise, possibly frugal

If you want to be the best solution, you need to measure a variety of possible combination of compression. Duration of compression, first check the existing job schedule again, and at no additional cost directly under the premise, duration of the potential savings goals.

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