Validation of Analysis Data

During validation testing, desired behaviors and unwanted problems were found by taking some of the following measures:

1. Tracing the paths of individual passengers and vehicles to ensure they make sense.

• Vehicles shouldn't move on their own when they're empty, unless they do so to make way for vehicles carrying passengers.
• Passengers should travel on a reasonably direct path towards their final destination.

2. Checking for optimality by attempting to find improvements to or deficiencies in the schedule. This task should be hard, or even impossible if the solver had found an optimal solution.

• Scenarios with multiple vehicle sizes and a high enough load should show a ``preference'' for using larger, more economical vehicles, supplemented by a few small vehicles running around feeding the larger ones to full capacity.