RE: [Demo notebook] Workbench questions: what to record before asking for service · RWI-02455

[ServiceLedger 00336]

Case 5 — Accuracy expectations: is -8 s/d acceptable on an entry-level automatic?

Start with how you measured it. Comparing against a phone clock once a day for a week, at the same time, and noting the offset is reliable enough. One 24-hour reading isn't, because rate depends on wrist time, position overnight and state of wind. Average across several days before deciding anything.