First decide on important results, such as inquiries or purchases, and identify the conditions that confirm completion and the events needed to record it. If you have a lot of data but it's not clear what decisions you'll use it for, reexamine the scope of your collection.
After confirming responsibilities, implementation requirements, access permissions, and data quality, we agree on a schedule and deliverables. It is not appropriate to promise a fixed number of meetings or delivery period without checking site conditions.