From the tiny to the giant. After the time it took to refuel the ultralight at every stop, I was intrigued by this website, optimizing the efficiency of block in to block out of a Boeing 767. It shows how different services are required by a large passenger airplane and how to best arrange the servicing vehicles to access the various orifices on the airplane.
I like the project management bar graphs showing the time required and available for each service. They take into account details like the fact that some last minute baggage may be thrown on while the main baggage conveyor is being put away. There are also very detailed tables showing the airflow rate required from ground carts for pneumatic engine start at different air temperatures and altitudes, and the requirements for ground towing vehicles. The latter is as complex as a take-off performance chase chart, with reference lines and slopes to follow for aircraft weight, traction wheel load, engine thrust resistance (even at idle the engine is resisting a backwards push), and seven different surface conditions, from dry concrete to ice.
You know how hot a car is when you return to it on a hot day. The usual technique is to open all the windows so the really hot air can escape before blasting the air conditioner. The problem with the hot vehicle scales up, but the doors on a Boeing are pretty small and only the front windows open, so the solution doesn't. There are tables here showing how long to expect it to take to cool (or heat) an airplane using ground services.
If makes sense that aircraft designers and airline planners put thought and effort into the efficiency of the turnaround, because the incredible speed of an airplane can easily be wasted waiting for the right things to be loaded and unloaded on the ground.