Perspective from the management side at a consulting place: We don't want or need you to log your time to the minute. It's counter-productive and a waste of time. It needs to just be representative and not dishonest (please read that sentence twice).

An hour long meeting booked, that ended up taking 45mins? It's an hour. It's the same reason we don't expect you to stop recording time when you to down the hall to make a coffee or take a bathroom break. The numbers only really makes sense at the aggregate level, and going to a higher level of detail is not reliable because of all the noise and different ways people measure their time.