涉众需求会转化为系统需求，该需求定义了系统必须执行的操作(功能性需求)，以及必须实现的程度(服务需求的质量)。
Stakeholder requirements are translated into system requirements that define what the system must do (functional requirements) and how well it must perform (quality of service requirements).
SV10a系统规则模型描述业务需求或运作任务需求所利用的影响系统功能的约束。
SV10a Systems Rules Model Describes constraints imposed on system functionality by business needs or operational mission requirements.
因此系统的目的是满足一系列投资者的需求，也就是所谓的系统需求。
Thus the purpose of the system is to satisfy a set of stakeholder needs — the system requirements.
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