To me, workmanship is something of a general flag for everything else. When things are put together neatly, then errors stand out, thus something put together neatly is more likely to be correct and to work.
If you see bad workmanship, then you will almost certainly be able to find definable violations.
With that said, I agree with iwire: workmanship is esthetics, and I don't see how it could be measured and enforced. Like I said, if you don't see good workmanship, odds are that you will be able to find describable violations, but if you if you don't see what you consider good workmanship, and you also can't find a violation, then how can you really say that the installation is wrong?
Finally, while workmanship seems to be a general flag, I have two recent examples where the flag was wrong. There was recently a post where someone had swapped ground and neutral in some panels. The workmanship was quite nice; just wrong. Also in my lab, someone had cleaned up a bit of a mess of some sensor cables; putting away a signal conditioner that was sitting on a stool several feet in front of a test stand...by the workmanship metric they improved the situation considerably, noise on the sensor increased so dramatically that we had to throw away a couple of days of data.
-Jon
P.S. Back to the OP: nice work!
