Observations:Power, Gain, Range, Alarm, Reset

Iteration 1

Iteration 2

Iteration 3

Iteration 4

Iteration 5

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Power - Label, no Label, Label

Range - conceptual model

Gain - feedback - need more levels

Changed task description:

"What would you do to see less debris?" Leading question (refer back to gain task on graph)

Alarm - Icons poorly understood, text didn’t help, lose depth alarm