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I am working on a planning system for a logistics company and their sorting machine (loop sorter, a couple of hundred chutes, 20.000 items/hour) - and I need an icon to show that a given chute doesn't have an assigned role in the sorting plan.

And I'm stumped. I already have an 'idle' icon (does have an assigned role, but hasn't have any items sent to it) and 'in use' (has had items sent to it)

Any ideas?

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Can you share the idle and in use icons with us? They might help inspire a design that's consistent with the others. –  Mike Brown Aug 26 '13 at 14:11
    
Depends a lot of what icon of an assigned item looks like. You can have sample of non associated file in disk explorer. It could be question mark, an almost transparent icon... –  ColdCat Aug 26 '13 at 14:30
    
Can colour be brought into play? You might find that your green "no items despite being assigned" icon could become red to indicate "no items because it's unassigned". –  Andrew Leach Aug 26 '13 at 15:30
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closed as off-topic by ChrisF, Charles Wesley, rk., JonW Aug 26 '13 at 17:33

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions requesting Icon Suggestions are off topic. While the subject of icons is on topic, there's very little value in soliciting suggestions for a specific icon in a specific context. See this meta post for more information about this topic." – ChrisF, Charles Wesley, rk., JonW
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