A while back, I built a complete field service management platform for the first time. It worked. But building it taught me as much about what I'd do differently as it taught me about field service software itself. So I built it again — FieldOS — the way I'd build it now, with everything I picked up the first time around. And this time I tracked every real hour it took, start to finish. Not to hit a deadline. To finally answer a question I'd always guessed at before: how much time does a proj...