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ICT

System flowcharts

Using system flowchart ideas

This system flowchartsystem flowchart: a visual representation of processes, decisions, inputs and outputs that together form a system is a diagram for a 'cruise control' for a car. The cruise control keeps the car at a steady speed that has been set by the driver.

The speed sensor detects the speed of the car. If the car is too fast, less fuel is provided to the engine and teh flow chart returns to the start. If it is not too fast, is it too slow? If it is too slow, more fuel is sent to the engine and the flow chart returns to the start. If it is not too slow, the flow chart returns to the start.

A system flowchart for cruise control on a car

The flowchart shows what the outcome is if the car is going too fast or too slow. The system is designed to add fuel, or take it away and so keep the car's speed constant. The outputoutput: the term denoting either an exit or changes which exit a system and which activate/modify a process (the car's new speed) is then fed back into the system via the speed sensorsensor: an automatic input device that continuously monitors a set of computer controlled parameters, eg a parking sensor detects how close a vehicle is to the nearest object and alerts the driver if the distance falls outside of the specified parameters.

Other examples of uses for system diagrams include:

  • aircraft control
  • central heating
  • automatic washing machines
  • booking systems for airlines

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