Add 'average time spent on elevator' statistic.

[markbrouch]

I've noticed that some of my "best" solutions sometimes hold passengers hostage on the elevator, ignoring their floor for an extended period of time if it's for the good of the system. I think average time spent on an elevator would be an important metric to track, along the same lines as the existing average time spent waiting for an elevator.

Edit: I suppose the most beneficial metric for measuring an elevator system's effectiveness would be the average time to destination, which would include time spent waiting for and getting to the desired floor.

[gonchuki]

Your edit is what I think is lacking here.

Most of the solutions for the "minimum amount of moves" challenges hold the passengers hostage until the elevator is above a certain loadFactor, which is detrimental for the total time to destination metric.

This could effectively add a couple challenges where both amount of moves and max time to destination are relevant.

[magwo]

Yeah somewhat similar to #30

Note that Avg and max waiting time includes travel time... I'm pretty sure. :)