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Introduction to realtime system (Characteristics of Real-Time Systems…

- - - - Environment factors such as temperature, shock and vibration, size limits, weight limits, usually have an impact on the system hardware and software requirements
    - - The devices which are typically interfaced to a RTS are many
        e.g. sensors, actuators, switches, displays, communication links, D/A and A/D converters, and pulse-width-modulated controllers
    - - Fault-tolerant requirements and Exception handling have special consideration due to the high reliability and critical timing requirements.
        Fault-tolerance requirements greatly impact and usually complicate the design of software and hardware components of the system.
- - - - Throughput
        
        Average number of instructions processed per second
      - Availability
        
        Fraction of time for which the system is up
      - Reliability
        
        Probability that the system will remain up throughout a designated interval