Systems Analysis and Design in HIT

A system can be defined as a collection of interrelated components (subsystems) that work together as a whole to achieve an outcome.1 There are many types of systems, ranging from biological systems to political systems. A health information system is a collection of interrelated components or subsystems that input and process data to produce an output that is needed for healthcare tasks. For example, EHRs have been designed to support physicians’ use of information in dealing with patients.2 An EHR might consist of the following subsystems: patient scheduling, medications, documentation, laboratory information, and diagnostic imaging. As shown in Figure 36-1, these subsystems could be broken down further into ...

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