详细调查为系统分析和新系统逻辑模型的建立提供详尽的、准确的、完整的系统的资料。详细调查的主要内容包括现有系统的运行环境和状况、系统功能、（ ）、资源情况、约束条件和薄弱环节等。如果对某现有系统进行详细调查时，发现该系统业务复杂，涉及岗位较多，系统的历史遗留文档全面、数量很大时，可以采用（ ）方法。
问题1选项
A.业务流程
B.数据库模型
C.网络传输协议
D.编程语言
问题2选项
A.现场观摩
B.书面调查
C.个别访问
D.抽样调查
正确答案及解析
正确答案
解析
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