The basic unit of analysis and design in cognitive engineering is a cognitive system, composed of human and machine agents in a work domain that is delineated by roles, work and communication norms, artifacts, and procedures.

• 计算机认知工程中的基本分析和设计的工具是认知系统，主要由人、机双方在工作过程中所扮演的角色、工作与交流的模式、媒介和过程等元素组成。