Exercise 0.A - Seven days of decisions
Keep the log for seven consecutive days. Do not choose a quiet week, and do not restart because a day was unrepresentative.
Record one row for every occasion you can identify where a system ranked, filtered, scored, predicted or matched something: five fields per row. The service, named. What it decided. What information it could plausibly have used. Whether a person reviewed the output, as far as you can tell. And what you would have wanted to ask about it.
At the end of the week, count the rows by category: message and content filtering, recommendation, identity and verification, scoring and eligibility, prediction. Then mark the three rows you would least want removed and the three you understand least.
You are finished when you have at least fifteen rows across five days, a count by category, and the two sets of three.
For a useful record, avoid two common shortcuts. The first is recording only what happened on a screen, which loses the bank's fraud check, the recruitment screen, the call routing, and the camera at the office door. The second is filling it in on the seventh day from memory, which produces a document that agrees with the impression you already had, which is the document you started with.