The system of communication plays a critical role in the design, management and change management of purposeful human activity systems. This occurs not only in the verbal and written form of communication but also in the assimilation and interpretation of purposeful human activity system signs. The authors propose that purposeful human activity systems exhibit four types of signs: those indicating the system's persisting meaning, behaviour, structure and process. These signs together indicate the current state of the purposeful human activity system they emerge from and form the foundations of the communication system. Currently, the connection of signs back to a communication system has been largely unexplored, and a taxonomy for identifying and delineating signs in this research context does not exist. The authors present the theoretical virtue of purposeful human activity system signs and a taxonomy developed for identifying and delineating system signs with application for novice system analysts.

中文翻译：

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有目的的人类活动系统分类法是提高系统素养的一种手段

通信系统在有目的的人类活动系统的设计，管理和变更管理中起着至关重要的作用。这不仅以口头和书面形式的交流发生，而且以有目的的人类活动系统标志的同化和解释发生。作者提出，有目的的人类活动系统表现出四种类型的标志：表明该系统的持久含义，行为，结构和过程的标志。这些标志共同表明了有目的的人类活动系统的当前状态，它们从通讯系统中出现并构成了通讯系统的基础。目前，还没有充分研究符号与通信系统之间的联系，在这种研究背景下，没有一种用于识别和描绘符号的分类法。