Support / Answers / Trouble
A finished job leaves the robot one destination, so a spell of driving that gets no closer to the dock is unambiguous. Either it cannot find the way, or something is in it.
Yardstick lists these per journey rather than per place, because a return trip either worked or it did not.
A line like drove 195 ft in 6.7 minutes without getting closer to the dock, 134 ft short of it needs no interpretation. Compare it with a journey that says it got there eventually, and you have the two ends of the problem.
The distance from the dock tells you whether it failed at the far end of the property or twenty feet from home. Those are different problems.
Gates, cars and bins are the usual answer, and they are only there at the time of day the robot travels.
If the failures are late in a long run, the robot is arriving at the return with too little left. Starting earlier, or splitting the yard into two jobs, gives it the margin.