为了评估我们的方法的成本/收益的权衡，我们称其为 PBR-UP，我们在一个小的软件开发项目环境中做了一个案例研究（一个基于对象的信息系统）。

To evaluate the cost/benefit tradeoff of our approach, which we call PBR-UP, we performed a case study in the context of a small software development project (an object-oriented information system).

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DNC计算机开发的软件不仅可以用于控制单件生产，而且可以用于一个企业制造部门的管理信息系统。

DNC software is developed not only to control individual pieces of prodution equipment, but also to serve as part of a management information system in the manufacturing sector of the firm.

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如何解决这种问题，已经成为信息系统开发理论当中一个新的研究课题。

How resolve this kind of problem, have already become a new researching topic of the information system development theories.

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