Whenever I use the security lane at an airport, I enjoy watching people retrieving their bags and metallic items when they emerge from the X-ray machine. You can quickly divide the population into two: a small minority of ‘logistically aware’ systems-thinkers and the logistically challenged majority.

To anyone with a grasp of systems thinking, it is obvious that the throughput of a security line is reduced when only a few people can retrieve their belongings at once.