Pointing and calling is a technique used by people to help them remember important things and check for errors while doing a task. It involves pointing at important things and verbally calling out what they are.
For example, let's say a train conductor is doing a safety check before the train leaves the station. While walking through the train, the conductor will first point at the emergency brake and say "emergency brake" out loud. This helps them remember to check that it is in working order. The conductor will then point at the doors and call out "doors closed and locked" to confirm that all the doors are properly secured.
By using this technique, people are less likely to forget important steps and are able to identify errors more easily. It is commonly used in the transportation industry, such as train conductors and airline pilots, but it can also be used in many other fields.