有三种任务类型：固定单位、固定工时和固定工期。

There are three task types: Fixed Units, Fixed Work, and Fixed Duration.

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也就是说，不要用工时表，不要有固定的工作小时数，甚至不要暗示员工“必须”每天工作8小时。

I.e. No time sheets, no fixed working hours, not even a suggestion that you are "required" to work 8 hours a day.

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在加工时间可压缩的排序问题中，工件的加工时间参数是不固定的，因此我们可以压缩工件原始的加工时间，产生压缩费用。

In the controllable processing time problems, time parameters of jobs may not be fixed, so we can compress the original processing time, and reduce the corresponding pressure cost.

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