The partner selection problem with bid cost and completion time factors with a due date constraint is a fundamental problem in virtual enterprises.

具有项目投标价格和完工时间因素的带工期约束的伙伴选择问题是企业动态联盟的基本问题，证明了该问题是NP完全问题。

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For example, a constraint of the maximum value of a day field within an element representing a date would depend on the month, and even year, fields.

例如，对表示日期元素中的day字段的最大值的约束取决于month、甚至是year字段。

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If you have start or finish dates that are fixed, use the Constraint Type and Constraint date.

如果您有任务开始或完成日期固定，则使用限制类型和限制日期字段。

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"Studies show that Northampton Station is already at capacity during peak hours, while the station building and its associated facilities are out-of-date, and a constraint to economic growth, " WNDC said.

BBC: Designs for Northampton railway station