Read the following passage about business process change and choose the best words for blanks (1)~(5).
System analysis begins by identifying the organization's business ____ (1) and translating them into system requirements. In early information systems, IT often provided a simple ____ (2) between users and existing manual work. As organizations mature, information systems support business process ____ (3), replacing repetitive manual tasks with software. The next step is business process ____ (4), where existing processes are measured and improved without changing their fundamental structure. When radical change is required, organizations may adopt business process ____ (5), redesigning processes from the ground up.
系统分析专业英语常围绕业务需求、流程改进和信息系统规划展开。requirements 指组织的业务需求，是系统需求转换的起点；interface 表示用户与既有人工流程或系统之间的接口；automation 强调用软件替代重复人工任务；improvement 是在不根本改变流程结构的基础上度量和优化；re-engineering 则表示从根本上重新设计业务流程。做完型时要结合前后动词和业务语境判断固定搭配。
本题是系统分析师专业英语完型填空，考查业务流程分析语境下的术语搭配。
语境定位：原句为 “identifying the organization's business ____ and translating them into system requirements”。
答案判断：system analysis 首先捕获业务需求，requirements 与后文 system requirements 形成搭配。因此应选 requirements。
选项辨析：
A. requirements：能准确补足原文语义，正确。
B. deployment：与业务流程分析上下文不匹配，错误。
C. encryption：与业务流程分析上下文不匹配，错误。
D. registers：与业务流程分析上下文不匹配，错误。
因此，选项 A 正确。