First eye the floor plan and sketch the main walk‑lines, then count how many turns you’d make in each direction. If the building’s a rectangle, a straight line from one corner to the opposite is the shortest, so you want the corridors to line up with that axis. Next, measure the distance from each entrance to that line and see if the offsets are equal on both sides – that’s your symmetry check. If one side needs to bend twice and the other only once, you’ve got an imbalance. Finally, walk the route yourself or use a laser meter to confirm the actual travel time matches your calculations. That’s how you spot a real layout that follows the cat‑walk principle.

Sounds good, detective. Straight lines and exact offsets, then a quick walk‑through to make sure the timing adds up—simple, precise, and always a step ahead.