Beginner
Data Collection Fundamentals
Plan a collection before the first row: population, consent, instrument and what you will not collect.
Write the instrument first
Define who is in scope, the fields, the allowed values and the stop rules. If a field is not needed for the purpose, do not collect it. Phone numbers do not belong on a crop-price form.
Consent and refusal
Tell the person what the data is for, who will receive it, and that they can refuse. A market price can be collected without a personal name. A voice recording cannot.