When a manager is trying to decide how to treat a subordinate, he asks himself: "if i treat this person in this way, would i want to switch places with this subordinate and have my supervisor treat me in this way? " in this scenario, he is applying the:

In this scenario, he is applying the reversibility test

Explanation:

Reversibility test means you put yourself in a position of others and imagine how the same effect that you apply to them will feel if it were to be applied to you if your were to be in their positions. It teaches someone to think morally and practice good ethics where they don't consider only themselves and their own feeling but also consider the feelings of others.

It works with the social rule which state "Do unto others as you would have them do unto you "