System Diagramming Basics
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Transcript of System Diagramming Basics
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System Diagramming Basics
IXDSN-‐210: SystemsTim Sheiner
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Agenda
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The pointBenefits and limitaCons of diagramsThe reference bookProcessConvenConsAnnotaConDecoraCon
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of system diagrams?
What is the point
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CommunicaCon.
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System Diagrams as a tool
Benefits•O#en actually worth one thousand words•Help you—the designer—definitely•Ac:vate visual and spa:al cogni:ve machinery
LimitaCons•Not dynamic•Help others—not the designer—maybe•Can become an end, rather than a means
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A Reference Book: Communica:ng Design
The good things•Dan’s POV: read chapter 2!•The informa:on architecture of the book•The examples•The detail (well explained trees)
The less good things•systems-‐specific ar:facts not covered•The physical format of the book•The detail (obscures the forest)
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suggested order of operaCons for construcCng diagrams
Process
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Diagramming Process1
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1. [Make a list of the pieces]2. Sketch3. Move to final medium4. Color sparingly5. Use conven:ons6. Label, label, label
7. [Collaborate]1. Share2. Revisit Inputs
8. Iterate1. Explore a different approach2. Move stuff around
1adapted from CommunicaCng Design, pp 18-‐19
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Process: Sketch
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Process: Place the Objects
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Process: Make Connec:ons
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Process: Refine
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The diagram AND the learning are the valuable outcomes
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~3 hours
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Diagramming Conven:on
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1. Follow conven:on2. If there is no relevant standard to follow, apply a standard of
consistency
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// diagramming conven:on
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If !(relevantStandard) {internalConsistency;
}
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of following an ad hoc internal standard...
An example
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Diagramming Conven:ons
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Diagramming Conven:ons
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rectangle = plug-‐in logic
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Diagramming Conven:ons
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rounded rectangle = controller logic
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round = API type object
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Diagramming Conven:ons
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Diagramming Conven:ons
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brackets = sub system
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Diagramming Conven:ons
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brackets = sub system
layer: use of different bracket styles conveys an actual difference
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Annota:on
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Text associated with the illustraCon and intended to clarify its meaning. A common kind of layer applied to info graphics.
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Notes
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notes
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Key
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key
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Call out
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this is a call outand this is a leader line
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Decora:on
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Imagery, embellishment, shading or any kind of non-‐textual marks applied to an illustraCon to improve its communicaCon value. Oben subject to abuse.
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Examples of Decora:on
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Advice
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Master your tools.
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Advice
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Maximize data-‐ink raCo2.
pixels devoted to non-‐redundant informa:on
total pixels of graphic
2Tube, The Visual Display of QuanCtaCve InformaCon, p. 93
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Advice
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Keepitsimple,stupid.
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Fin
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