Seeing a circuit instead of reading it

The circuits cockpit. Each disc is a gate; the lines show the order in which they are crossed.

A circuit is a series of gates. A piece of work enters through the first one and only comes out if it passes them all. We have 155.

Written down, they fit in a table: one row per gate, an order number, a keeper name. You can read that. You cannot see it.

What the drawing adds

In the picture, each disc is a gate and the lines say in which order they are crossed. The small red flags mark the places where a message was refused. You can tell at a glance which gates refuse often, and which ones never refuse.

The number that stings

98 circuits out of 155 have never been started. They are written procedures nobody follows. The panel counts them and says so, family by family — writing and publishing, the agents, the workshop, deployment, security.

A table would have hidden that number in its last column.