AEIOU: Five Buckets for Field Notes

AEIOU sorts notes into five buckets—Activities, Environments, Interactions, Objects, Users—so patterns emerge from chaos. Use it during field studies to categorize raw data. The footgun is treating its categories as rigid rules not editable heuristics.
AEIOU is a mnemonic that forces messy qualitative notes into five buckets—Activities, Environments, Interactions, Objects, and Users—so patterns emerge from raw observation chaos. Use it during usability tests and field studies to categorize what you see, hear, and feel in real time. The framework was designed as editable heuristics by creator Rick E. Robinson, yet teams often freeze the categories into rigid rules and miss context that does not fit the template.
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