A study room removes the kettle, the child at the door, and the second phone on the counter. Field Observation Days put those interruptions back in.
We spend a contracted day with a household or a small workplace that already uses the utility. The brief is narrow: watch when the settings are opened in the flow of other work, and what people say when a control is not where they last left it.
This is not a filmed ethnography and not a full audit. It is a day of notes, photographs of the physical setting (never of documents or faces without consent), and a short written account of when settings were touched.
Travel is priced inside Selangor. Visits further into the peninsula are quoted separately. We do not arrive unannounced; the host agrees the window in writing.
Pair a field day with an Interaction Audit when you need both the quiet tap-by-tap record and the messy hour in a real kitchen.