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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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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
If this question can be reworded to fit the rules in the help center, please edit the question.

Can you share the idle and in use icons with us? They might help inspire a design that's consistent with the others. – Michael 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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