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How to draw a system diagram

How to draw a system diagram. Project Management Unit #2a. Basic Steps. Identify all major components These are your subsystems Derived from your project goal, objectives and requirements Identify all interfaces between components

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How to draw a system diagram

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  1. How to draw a system diagram Project Management Unit #2a Drawing a System Diagram

  2. Basic Steps • Identify all major components • These are your subsystems • Derived from your project goal, objectives and requirements • Identify all interfaces between components • These are either relationships or real connections between components • Produce your drawing • Components are labeled boxes • Interfaces are arrowed lines keyed to the interface function • Keep your layout as straight forward as possible Drawing a System Diagram

  3. Identify Major Components • Components are based upon the project goal, objectives and requirements: • To measure something you need a Sensor Subsystem • To store your data you need a Data Archive Subsystem • For your payload to operate by itself during flight you need a Control Subsystem • To enable your payload to operate you need a Power Subsystem • To keep your payload from falling apart you need a Mechanical Support Subsystem • To keep your experiment at the correct temperature you need a Thermal Control Subsystem • To analyze your data offline you need a Ground Support Subsystem • More or different kinds of subsystems might be required • You also need to understand where these subsystems are located Drawing a System Diagram

  4. Example Component Drawing • Each sub-system has its own box • Components are arranged in a logical order • Components are grouped according to their relational location Drawing a System Diagram

  5. Determine the interfaces • Interfaces are the “connections” between the components • Could be a physical connection (e.g. wire, bolt) • Could be a relationship / property (e.g. temperature, light) • Each unique interface should be represented by a different kind of line • Each interface should be labeled according to its specific characteristics • Arrows on the ends of the line indicate flow Drawing a System Diagram

  6. Interface representations • Interfaces types • Power • Data • Control • Mechanical • Thermal • Interface flow • To component • From component • Bi-directional Drawing a System Diagram

  7. Add the interfaces Drawing a System Diagram

  8. Indicate the interface flow Drawing a System Diagram

  9. Complete the labeling Drawing a System Diagram

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