Messy data collection usually happens because there's no standardized process—everyone records in different formats, making it painful to consolidate later. Solutions come in layers. First, define which fields need to be collected before testing begins—order volume, customer feedback, price acceptance or rejection, cancellation or return reasons—and use a uniform format regardless of who enters data. Second, embed the recording action into daily operations rather than creating a separate "test-only form," otherwise people will skip it when busy. Third, keep each test focused on one variable; smaller data sets are easier to digest and conclusions are clearer. If the process is standardized, expanding the test scope later is simple without redesigning everything.