Do not infer transit load conditions from endpoint-city weather.
Divide the route into operating segments and actual wait points.
Timestamp border, terminal, pass and transfer events.
Before a pilot, record route, season and vehicle type.
Take product acceptance conditions from the current protocol.
For external weather data, record station, interval and time zone.
Do not treat station data as product temperature.
Place a logger near the product and record its device ID.
Put start, stop and removal times on one timeline.
Keep vehicle sensor or telematics data in a separate channel.
Link door openings and cargo transfers to event times.
At arrival, identify the highest and lowest readings on the trace.
Link each extreme to time and route segment.
Verify the product decision criterion against the current protocol.
Escalate deviations to the authorised product owner.
Measure the same lane again under another season's conditions.
Explain trip differences through route and operating changes.
Do not generalise one trip to a country or year.
Retain weather source, delay and route change in the report.
Update the plan from new results.
