对于信息系统项目来说，确定信息系统必须完成总目标，确定工程可行性，导出实现工程目标应该采取策略及必须完成功能，估计完成该项目工程资源和成本，并且制定工作大致进度表过程属于项目（）阶段。
- A.系统分析
- B.系统设计
- C.需求分析
- D.可行性研究
正确答案及解析
正确答案
解析
系统分析，也叫系统调查与分析，是信息系统生命周期第一个阶段，也是最重要一个环节。系统分析时期任务包括确定信息系统必须完成总目标，确定工程可行性，导出实现工程目标应该采取策及系统必须完成功能，估计完成该项工程需要资源和成本，并且制定工程进度表。系统分析时期通常进一步划分成三个阶段，即问题定义、可行性研究和需求分析。问题定义阶段主要任务是确定所开发信息系统要完成目标是什么，如果不知道信息系统目标就试图开发信息系统，显然是盲目，只会白白浪费时间和金钱。可行性研究阶段主要任务是分析达到信息系统目标是否存在可行办法。可行性研究结果是信息系统负责人做出是否继续进行这个信息系统开发决定重要依据。一般来说，只有投资可能取得较大效益那些信息系统才值得继续进行下去，及时终止不值得投资工程项目，可以避免更大浪费。需求分析阶段主要任务是确定目标系统必须具备哪些功能以及系统正常运行时应满足性能指标。
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